diff --git a/examples/osgfpdepth/osgfpdepth.cpp b/examples/osgfpdepth/osgfpdepth.cpp
index c71634ad8..40c1a2e3d 100644
--- a/examples/osgfpdepth/osgfpdepth.cpp
+++ b/examples/osgfpdepth/osgfpdepth.cpp
@@ -23,7 +23,6 @@
 #include <osg/Geometry>
 #include <osg/GLExtensions>
 #include <osg/Node>
-#include <osg/NodeCallback>
 #include <osg/Notify>
 #include <osg/observer_ptr>
 #include <osg/Projection>
diff --git a/examples/osgposter/PosterPrinter.h b/examples/osgposter/PosterPrinter.h
index 952d36b7a..eaa369d0a 100644
--- a/examples/osgposter/PosterPrinter.h
+++ b/examples/osgposter/PosterPrinter.h
@@ -10,40 +10,41 @@ class PosterVisitor : public osg::NodeVisitor
 {
 public:
     typedef std::set<std::string> PagedNodeNameSet;
-    
+
     PosterVisitor();
     META_NodeVisitor( osgPoster, PosterVisitor );
-    
+
     void insertName( const std::string& name )
     { if ( _pagedNodeNames.insert(name).second ) _needToApplyCount++; }
-    
+
     void eraseName( const std::string& name )
     { if ( _pagedNodeNames.erase(name)>0 ) _needToApplyCount--; }
-    
+
     void clearNames() { _pagedNodeNames.clear(); _needToApplyCount = 0; _appliedCount = 0; }
     unsigned int getNumNames() const { return _pagedNodeNames.size(); }
-    
+
     PagedNodeNameSet& getPagedNodeNames() { return _pagedNodeNames; }
     const PagedNodeNameSet& getPagedNodeNames() const { return _pagedNodeNames; }
-    
+
     unsigned int getNeedToApplyCount() const { return _needToApplyCount; }
     unsigned int getAppliedCount() const { return _appliedCount; }
     unsigned int inQueue() const { return _needToApplyCount>_appliedCount ? _needToApplyCount-_appliedCount : 0; }
-    
+
     void setAddingCallbacks( bool b ) { _addingCallbacks = b; }
     bool getAddingCallbacks() const { return _addingCallbacks; }
-    
+
     virtual void apply( osg::LOD& node );
     virtual void apply( osg::PagedLOD& node );
-    
+
 protected:
-    bool hasCullCallback( osg::NodeCallback* nc, osg::NodeCallback* target )
+
+    bool hasCullCallback( osg::Callback* nc, osg::Callback* target )
     {
         if ( nc==target ) return true;
         else if ( !nc ) return false;
         return hasCullCallback( nc->getNestedCallback(), target );
     }
-    
+
     PagedNodeNameSet _pagedNodeNames;
     unsigned int _appliedCount;
     unsigned int _needToApplyCount;
@@ -55,24 +56,24 @@ class PosterIntersector : public osgUtil::Intersector
 {
 public:
     typedef std::set<std::string> PagedNodeNameSet;
-    
+
     PosterIntersector( const osg::Polytope& polytope );
     PosterIntersector( double xMin, double yMin, double xMax, double yMax );
-    
+
     void setPosterVisitor( PosterVisitor* pcv ) { _visitor = pcv; }
     PosterVisitor* getPosterVisitor() { return _visitor.get(); }
     const PosterVisitor* getPosterVisitor() const { return _visitor.get(); }
-    
+
     virtual Intersector* clone( osgUtil::IntersectionVisitor& iv );
-    
+
     virtual bool containsIntersections()
     { return _visitor.valid()&&_visitor->getNumNames()>0; }
-    
+
     virtual bool enter( const osg::Node& node );
     virtual void leave() {}
     virtual void reset();
     virtual void intersect( osgUtil::IntersectionVisitor& iv, osg::Drawable* drawable );
-    
+
 protected:
     osgUtil::IntersectionVisitor* _intersectionVisitor;
     osg::ref_ptr<PosterVisitor> _visitor;
@@ -86,60 +87,60 @@ class PosterPrinter : public osg::Referenced
 public:
     typedef std::pair<unsigned int, unsigned int> TilePosition;
     typedef std::map< TilePosition, osg::ref_ptr<osg::Image> > TileImages;
-    
+
     PosterPrinter();
-    
+
     /** Set to output each sub-image-tile to disk */
     void setOutputTiles( bool b ) { _outputTiles = b; }
     bool getOutputTiles() const { return _outputTiles; }
-    
+
     /** Set the output sub-image-tile extension, e.g. bmp */
     void setOutputTileExtension( const std::string& ext ) { _outputTileExt = ext; }
     const std::string& getOutputTileExtension() const { return _outputTileExt; }
-    
+
     /** Set the output poster name, e.g. output.bmp */
     void setOutputPosterName( const std::string& name ) { _outputPosterName = name; }
     const std::string& getOutputPosterName() const { return _outputPosterName; }
-    
+
     /** Set the size of each sub-image-tile, e.g. 640x480 */
     void setTileSize( int w, int h ) { _tileSize.set(w, h); }
     const osg::Vec2& getTileSize() const { return _tileSize; }
-    
+
     /** Set the final size of the high-res poster, e.g. 6400x4800 */
     void setPosterSize( int w, int h ) { _posterSize.set(w, h); }
     const osg::Vec2& getPosterSize() const { return _posterSize; }
-    
+
     /** Set the capturing camera */
     void setCamera( osg::Camera* camera ) { _camera = camera; }
     const osg::Camera* getCamera() const { return _camera.get(); }
-    
+
     /** Set the final poster image, should be already allocated */
     void setFinalPoster( osg::Image* image ) { _finalPoster = image; }
     const osg::Image* getFinalPoster() const { return _finalPoster.get(); }
-    
+
     PosterVisitor* getPosterVisitor() { return _visitor.get(); }
     const PosterVisitor* getPosterVisitor() const { return _visitor.get(); }
-    
+
     bool done() const { return !_isRunning && !_isFinishing; }
-    
+
     void init( const osg::Camera* camera );
     void init( const osg::Matrixd& view, const osg::Matrixd& proj );
     void frame( const osg::FrameStamp* fs, osg::Node* node );
-    
+
 protected:
     virtual ~PosterPrinter() {}
-    
+
     bool addCullCallbacks( const osg::FrameStamp* fs, osg::Node* node );
     void removeCullCallbacks( osg::Node* node );
     void bindCameraToImage( osg::Camera* camera, int row, int col );
     void recordImages();
-    
+
     bool _outputTiles;
     std::string _outputTileExt;
     std::string _outputPosterName;
     osg::Vec2 _tileSize;
     osg::Vec2 _posterSize;
-    
+
     bool _isRunning;
     bool _isFinishing;
     unsigned int _lastBindingFrame;
@@ -149,7 +150,7 @@ protected:
     int _currentColumn;
     osg::ref_ptr<PosterIntersector> _intersector;
     osg::ref_ptr<PosterVisitor> _visitor;
-    
+
     osg::Matrixd _currentViewMatrix;
     osg::Matrixd _currentProjectionMatrix;
     osg::ref_ptr<osg::Camera> _camera;
diff --git a/examples/osgvertexprogram/osgvertexprogram.cpp b/examples/osgvertexprogram/osgvertexprogram.cpp
index 18c3e17c3..a8d211e96 100644
--- a/examples/osgvertexprogram/osgvertexprogram.cpp
+++ b/examples/osgvertexprogram/osgvertexprogram.cpp
@@ -25,7 +25,6 @@
 #include <osg/Geode>
 #include <osg/Transform>
 #include <osg/Material>
-#include <osg/NodeCallback>
 #include <osg/Depth>
 #include <osg/CullFace>
 #include <osg/TexMat>
@@ -220,7 +219,7 @@ class MoveEarthySkyWithEyePointTransform : public osg::Transform
 {
 public:
     /** Get the transformation matrix which moves from local coords to world coords.*/
-    virtual bool computeLocalToWorldMatrix(osg::Matrix& matrix,osg::NodeVisitor* nv) const 
+    virtual bool computeLocalToWorldMatrix(osg::Matrix& matrix,osg::NodeVisitor* nv) const
     {
         osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(nv);
         if (cv)
@@ -270,7 +269,7 @@ osg::Node* createSkyBox()
     // clear the depth to the far plane.
     osg::Depth* depth = new osg::Depth;
     depth->setFunction(osg::Depth::ALWAYS);
-    depth->setRange(1.0,1.0);   
+    depth->setRange(1.0,1.0);
     stateset->setAttributeAndModes(depth, osg::StateAttribute::ON );
 
     stateset->setRenderBinDetails(-1,"RenderBin");
@@ -305,7 +304,7 @@ osg::Node* addRefractStateSet(osg::Node* node)
     osg::TextureCubeMap* reflectmap = readCubeMap();
     stateset->setTextureAttributeAndModes( 0, reflectmap, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
     stateset->setTextureAttributeAndModes( 1, reflectmap, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
-    
+
     osg::TexMat* texMat = new osg::TexMat;
     stateset->setTextureAttribute(0, texMat);
 
@@ -329,14 +328,14 @@ osg::Node* addRefractStateSet(osg::Node* node)
 
     // REPLACE function: Arg0
     // = T0
-    osg::TexEnvCombine *te0 = new osg::TexEnvCombine;    
+    osg::TexEnvCombine *te0 = new osg::TexEnvCombine;
     te0->setCombine_RGB(osg::TexEnvCombine::REPLACE);
     te0->setSource0_RGB(osg::TexEnvCombine::TEXTURE0);
     te0->setOperand0_RGB(osg::TexEnvCombine::SRC_COLOR);
-    
+
     // INTERPOLATE function: Arg0 * (Arg2) + Arg1 * (1-Arg2)
     // = T1 * C0.a + Cp * (1-C0.a)
-    osg::TexEnvCombine *te1 = new osg::TexEnvCombine;    
+    osg::TexEnvCombine *te1 = new osg::TexEnvCombine;
 
     // rgb = Cp + Ct
     te1->setCombine_RGB(osg::TexEnvCombine::INTERPOLATE);
@@ -354,7 +353,7 @@ osg::Node* addRefractStateSet(osg::Node* node)
     group->addChild(node);
     group->setCullCallback(new TexMatCallback(*texMat));
     group->setStateSet( stateset );
-    
+
     return group;
 }
 
@@ -385,7 +384,7 @@ int main(int argc, char *argv[])
     osgUtil::Optimizer optimzer;
     optimzer.optimize(model);
 
-    // create normals.    
+    // create normals.
     osgUtil::SmoothingVisitor smoother;
     model->accept(smoother);
 
@@ -393,7 +392,7 @@ int main(int argc, char *argv[])
 
     // add a viewport to the viewer and attach the scene graph.
     viewer.setSceneData(rootnode);
-    
+
     // create the windows and run the threads.
     viewer.realize();
 
diff --git a/include/osg/AnimationPath b/include/osg/AnimationPath
index f96e53028..15df5f685 100644
--- a/include/osg/AnimationPath
+++ b/include/osg/AnimationPath
@@ -21,7 +21,7 @@
 #include <osg/Matrixf>
 #include <osg/Matrixd>
 #include <osg/Quat>
-#include <osg/NodeCallback>
+#include <osg/Callback>
 
 namespace osg {
 
diff --git a/include/osg/Callback b/include/osg/Callback
new file mode 100644
index 000000000..ff4c2dca2
--- /dev/null
+++ b/include/osg/Callback
@@ -0,0 +1,202 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
+ *
+ * This library is open source and may be redistributed and/or modified under
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * OpenSceneGraph Public License for more details.
+*/
+
+#ifndef OSG_CALLBACK
+#define OSG_CALLBACK 1
+
+#include <osg/Object>
+#include <osg/UserDataContainer>
+
+namespace osg {
+
+
+class Callback : public virtual Object {
+
+    public :
+
+        Callback(){}
+
+        Callback(const Callback& cb,const CopyOp&):
+            _nestedCallback(cb._nestedCallback) {}
+
+        META_Object(osg, Callback);
+
+        /** Invoke the callback, first parameter is the Object that the callback is attached to,
+         *  the second parameter, the data, is typically the NodeVisitor that is invoking the callback.
+         *  The run(..) method may be overriden by users directly, or if the user is using one of the old
+         *  style callbacks such as NodeCallback or Drawable::UpdateCallback then you can just override
+         *  the appropriate callback method on those callback subclasses.
+         *  If you are implementing your own callback then one should call traverse() to make sure nested callbacks
+         *  and visitor traversal() is completed. */
+        virtual bool run(osg::Object* object, osg::Object* data)
+        {
+            return traverse(object, data);
+        }
+
+        /** traverse the nested callbacks or call NodeVisitor::traverse() if the object is Node, and data is NodeVisitor.*/
+        bool traverse(osg::Object* object, osg::Object* data);
+
+        void setNestedCallback(osg::Callback* cb) { _nestedCallback = cb; }
+        osg::Callback* getNestedCallback() { return _nestedCallback.get(); }
+        const osg::Callback* getNestedCallback() const { return _nestedCallback.get(); }
+
+        inline void addNestedCallback(osg::Callback* nc)
+        {
+            if (nc)
+            {
+                if (_nestedCallback.valid())
+                {
+                    _nestedCallback->addNestedCallback(nc);
+                }
+                else
+                {
+                    _nestedCallback = nc;
+                }
+            }
+        }
+
+        inline void removeNestedCallback(osg::Callback* nc)
+        {
+            if (nc)
+            {
+                if (_nestedCallback==nc)
+                {
+                    ref_ptr<osg::Callback> new_nested_callback = _nestedCallback->getNestedCallback();
+                    _nestedCallback->setNestedCallback(0);
+                    _nestedCallback = new_nested_callback;
+                }
+                else if (_nestedCallback.valid())
+                {
+                    _nestedCallback->removeNestedCallback(nc);
+                }
+            }
+        }
+
+    protected:
+
+        virtual ~Callback() {}
+        ref_ptr<Callback> _nestedCallback;
+};
+
+typedef std::vector< osg::ref_ptr<osg::Object> > Parameters;
+
+/** Callback for attaching a script to a Node's via there UserDataContainer for the purpose of overriding class methods within scripts.*/
+class OSG_EXPORT CallbackObject : public virtual osg::Callback
+{
+public:
+    CallbackObject() {}
+    CallbackObject(const std::string& name) { setName(name); }
+    CallbackObject(const CallbackObject& rhs, const osg::CopyOp copyop=osg::CopyOp::SHALLOW_COPY):osg::Callback(rhs,copyop) {}
+    META_Object(osg, CallbackObject);
+
+    virtual CallbackObject* asCallbackObject() { return this; }
+    virtual const CallbackObject* asCallbackObject() const { return this; }
+
+    /** override Callback::run() entry point to adapt to CallbackObject::run(..) method.*/
+    bool run(osg::Object* object, osg::Object* data);
+
+    inline bool run(osg::Object* object) const
+    {
+        osg::Parameters inputParameters;
+        osg::Parameters outputParameters;
+        return run(object, inputParameters, outputParameters);
+    }
+
+    virtual bool run(osg::Object* object, osg::Parameters& inputParameters, osg::Parameters& outputParameters) const;
+
+};
+
+/** Convinience function for getting the CallbackObject associated with specificed name from an Object's UserDataContainer.*/
+inline CallbackObject* getCallbackObject(osg::Object* object, const std::string& name)
+{
+    osg::UserDataContainer* udc = object->getUserDataContainer();
+    return udc ? dynamic_cast<osg::CallbackObject*>(udc->getUserObject(name)) : 0;
+}
+
+/** Call run(..) on named CallbackObjects attached to specified Object. Return true if at least one CallbackObject has been successfully invoked.*/
+inline bool runNamedCallbackObjects(osg::Object* object, const std::string& name, osg::Parameters& inputParameters, osg::Parameters& outputParameters)
+{
+    bool result = false;
+    osg::UserDataContainer* udc = object->getUserDataContainer();
+    if (udc)
+    {
+        for(unsigned int i = 0; i<udc->getNumUserObjects(); ++i)
+        {
+            osg::Object* obj = udc->getUserObject(i);
+            if (obj && obj->getName()==name)
+            {
+                osg::CallbackObject* co = dynamic_cast<osg::CallbackObject*>(obj);
+                if (co) result = co->run(object, inputParameters, outputParameters) | result;
+            }
+        }
+    }
+
+    return result;
+}
+
+
+
+// forward declare
+class Node;
+class NodeVisitor;
+
+
+/** Deprecated. */
+class OSG_EXPORT NodeCallback : public virtual Callback {
+
+    public :
+
+
+        NodeCallback(){}
+
+        NodeCallback(const NodeCallback& nc,const CopyOp& copyop):
+            Callback(nc,copyop) {}
+
+        META_Object(osg,NodeCallback);
+
+        /** NodeCallback overrides the Callback::run() method to adapt it the old style NodeCallback::operator()(Node* node, NodeVisitor* nv) method.*/
+        virtual bool run(osg::Object* object, osg::Object* data);
+
+        /** Callback method called by the NodeVisitor when visiting a node.*/
+        virtual void operator()(Node* node, NodeVisitor* nv);
+
+    protected:
+
+        virtual ~NodeCallback() {}
+};
+
+// forward declare
+class StateAttribute;
+
+/** Deprecated. */
+class OSG_EXPORT StateAttributeCallback : public virtual osg::Callback
+{
+    public:
+        StateAttributeCallback() {}
+
+        StateAttributeCallback(const StateAttributeCallback&,const CopyOp&) {}
+
+        META_Object(osg,StateAttributeCallback);
+
+        /** override Callback::run() entry point to adapt to StateAttributeCallback::run(..) method.*/
+        virtual bool run(osg::Object* object, osg::Object* data);
+
+        /** do customized update code.*/
+        virtual void operator () (StateAttribute*, NodeVisitor*) {}
+};
+
+
+} // namespace
+
+#endif
+
diff --git a/include/osg/ClusterCullingCallback b/include/osg/ClusterCullingCallback
index 339fcdc31..34976798e 100644
--- a/include/osg/ClusterCullingCallback
+++ b/include/osg/ClusterCullingCallback
@@ -15,7 +15,7 @@
 #define OSG_CLUSTERCULLINGCALLBACK 1
 
 #include <osg/Drawable>
-#include <osg/NodeCallback>
+#include <osg/Callback>
 
 namespace osg {
 
diff --git a/include/osg/CopyOp b/include/osg/CopyOp
index 096e0c526..fae50bd09 100644
--- a/include/osg/CopyOp
+++ b/include/osg/CopyOp
@@ -31,7 +31,7 @@ class Drawable;
 class Array;
 class PrimitiveSet;
 class Shape;
-class NodeCallback;
+class Callback;
 
 
 /** Copy Op(erator) used to control whether shallow or deep copy is used
@@ -80,7 +80,7 @@ class OSG_EXPORT CopyOp
         virtual PrimitiveSet*   operator() (const PrimitiveSet* primitives) const;
         virtual Shape*          operator() (const Shape* shape) const;
         virtual Uniform*        operator() (const Uniform* shape) const;
-        virtual NodeCallback*   operator() (const NodeCallback* nodecallback) const;
+        virtual Callback*       operator() (const Callback* nodecallback) const;
         virtual StateAttributeCallback* operator() (const StateAttributeCallback* stateattributecallback) const;
 
     protected:
diff --git a/include/osg/Drawable b/include/osg/Drawable
index d1afefef0..3cd0623a9 100644
--- a/include/osg/Drawable
+++ b/include/osg/Drawable
@@ -268,7 +268,7 @@ class OSG_EXPORT Drawable : public Node
           * for all graphics contexts. */
         virtual void releaseGLObjects(State* state=0) const;
 
-        struct UpdateCallback : public virtual osg::Object
+        struct OSG_EXPORT UpdateCallback : public virtual Callback
         {
             UpdateCallback() {}
 
@@ -276,24 +276,15 @@ class OSG_EXPORT Drawable : public Node
 
             META_Object(osg,UpdateCallback);
 
+            /** override Callback::run() entry point to adapt to StateAttributeCallback::run(..) method.*/
+            virtual bool run(osg::Object* object, osg::Object* data);
+
             /** do customized update code.*/
             virtual void update(osg::NodeVisitor*, osg::Drawable*) {}
         };
 
-        /** Set the UpdateCallback which allows users to attach customize the updating of an object during the update traversal. */
-        virtual void setUpdateCallback(UpdateCallback* ac);
 
-        /** Get the non const UpdateCallback.*/
-        UpdateCallback* getUpdateCallback() { return _drawableUpdateCallback.get(); }
-
-        /** Get the const UpdateCallback.*/
-        const UpdateCallback* getUpdateCallback() const { return _drawableUpdateCallback.get(); }
-
-        /** Return whether this Drawable has update callbacks associated with it, and therefore must be traversed.*/
-        bool requiresUpdateTraversal() const { return _drawableUpdateCallback.valid() || (_stateset.valid() && _stateset->requiresUpdateTraversal()); }
-
-
-        struct EventCallback : public virtual osg::Object
+        struct OSG_EXPORT EventCallback : public virtual Callback
         {
             EventCallback() {}
 
@@ -301,24 +292,14 @@ class OSG_EXPORT Drawable : public Node
 
             META_Object(osg,EventCallback);
 
+            /** override Callback::run() entry point to adapt to StateAttributeCallback::run(..) method.*/
+            virtual bool run(osg::Object* object, osg::Object* data);
+
             /** do customized Event code. */
             virtual void event(osg::NodeVisitor*, osg::Drawable*) {}
         };
 
-        /** Set the EventCallback which allows users to attach customize the updating of an object during the Event traversal.*/
-        virtual void setEventCallback(EventCallback* ac);
-
-        /** Get the non const EventCallback.*/
-        EventCallback* getEventCallback() { return _drawableEventCallback.get(); }
-
-        /** Get the const EventCallback.*/
-        const EventCallback* getEventCallback() const { return _drawableEventCallback.get(); }
-
-        /** Return whether this Drawable has event callbacks associated with it, and therefore must be traversed.*/
-        bool requiresEventTraversal() const { return _drawableEventCallback.valid() || (_stateset.valid() && _stateset->requiresEventTraversal()); }
-
-
-        struct CullCallback : public virtual osg::Object
+        struct CullCallback : public virtual Callback
         {
             CullCallback() {}
 
@@ -333,17 +314,6 @@ class OSG_EXPORT Drawable : public Node
             virtual bool cull(osg::NodeVisitor* nv, osg::Drawable* drawable, osg::RenderInfo* renderInfo) const { return cull(nv, drawable, renderInfo? renderInfo->getState():0); }
         };
 
-        /** Set the CullCallback which allows users to customize the culling of Drawable during the cull traversal.*/
-        virtual void setCullCallback(CullCallback* cc) { _drawableCullCallback=cc; }
-
-        /** Get the non const CullCallback.*/
-        CullCallback* getCullCallback() { return _drawableCullCallback.get(); }
-
-        /** Get the const CullCallback.*/
-        const CullCallback* getCullCallback() const { return _drawableCullCallback.get(); }
-
-
-
 
         /** Callback attached to an Drawable which allows the users to customize the drawing of an exist Drawable object.
           * The draw callback is implement as a replacement to the Drawable's own drawImplementation() method, if the
diff --git a/include/osg/Node b/include/osg/Node
index dcd9d508d..ec7ef4878 100644
--- a/include/osg/Node
+++ b/include/osg/Node
@@ -19,7 +19,7 @@
 #include <osg/StateSet>
 #include <osg/BoundingSphere>
 #include <osg/BoundingBox>
-#include <osg/NodeCallback>
+#include <osg/Callback>
 
 #include <string>
 #include <vector>
@@ -202,16 +202,16 @@ class OSG_EXPORT Node : public Object
 
 
         /** Set update node callback, called during update traversal. */
-        void setUpdateCallback(NodeCallback* nc);
+        void setUpdateCallback(Callback* nc);
 
         /** Get update node callback, called during update traversal. */
-        inline NodeCallback* getUpdateCallback() { return _updateCallback.get(); }
+        inline Callback* getUpdateCallback() { return _updateCallback.get(); }
 
         /** Get const update node callback, called during update traversal. */
-        inline const NodeCallback* getUpdateCallback() const { return _updateCallback.get(); }
+        inline const Callback* getUpdateCallback() const { return _updateCallback.get(); }
 
         /** Convenience method that sets the update callback of the node if it doesn't exist, or nest it into the existing one. */
-        inline void addUpdateCallback(NodeCallback* nc) {
+        inline void addUpdateCallback(Callback* nc) {
             if (nc != NULL) {
                 if (_updateCallback.valid()) _updateCallback->addNestedCallback(nc);
                 else setUpdateCallback(nc);
@@ -219,7 +219,7 @@ class OSG_EXPORT Node : public Object
         }
 
         /** Convenience method that removes a given callback from a node, even if that callback is nested. There is no error return in case the given callback is not found. */
-        inline void removeUpdateCallback(NodeCallback* nc) {
+        inline void removeUpdateCallback(Callback* nc) {
             if (nc != NULL && _updateCallback.valid()) {
                 if (_updateCallback == nc)
                 {
@@ -236,16 +236,16 @@ class OSG_EXPORT Node : public Object
 
 
         /** Set event node callback, called during event traversal. */
-        void setEventCallback(NodeCallback* nc);
+        void setEventCallback(Callback* nc);
 
         /** Get event node callback, called during event traversal. */
-        inline NodeCallback* getEventCallback() { return _eventCallback.get(); }
+        inline Callback* getEventCallback() { return _eventCallback.get(); }
 
         /** Get const event node callback, called during event traversal. */
-        inline const NodeCallback* getEventCallback() const { return _eventCallback.get(); }
+        inline const Callback* getEventCallback() const { return _eventCallback.get(); }
 
         /** Convenience method that sets the event callback of the node if it doesn't exist, or nest it into the existing one. */
-        inline void addEventCallback(NodeCallback* nc) {
+        inline void addEventCallback(Callback* nc) {
             if (nc != NULL) {
                 if (_eventCallback.valid()) _eventCallback->addNestedCallback(nc);
                 else setEventCallback(nc);
@@ -253,7 +253,7 @@ class OSG_EXPORT Node : public Object
         }
 
         /** Convenience method that removes a given callback from a node, even if that callback is nested. There is no error return in case the given callback is not found. */
-        inline void removeEventCallback(NodeCallback* nc) {
+        inline void removeEventCallback(Callback* nc) {
             if (nc != NULL && _eventCallback.valid()) {
                 if (_eventCallback == nc)
                 {
@@ -270,16 +270,16 @@ class OSG_EXPORT Node : public Object
 
 
         /** Set cull node callback, called during cull traversal. */
-        void setCullCallback(NodeCallback* nc) { _cullCallback = nc; }
+        void setCullCallback(Callback* nc) { _cullCallback = nc; }
 
         /** Get cull node callback, called during cull traversal. */
-        inline NodeCallback* getCullCallback() { return _cullCallback.get(); }
+        inline Callback* getCullCallback() { return _cullCallback.get(); }
 
         /** Get const cull node callback, called during cull traversal. */
-        inline const NodeCallback* getCullCallback() const { return _cullCallback.get(); }
+        inline const Callback* getCullCallback() const { return _cullCallback.get(); }
 
         /** Convenience method that sets the cull callback of the node if it doesn't exist, or nest it into the existing one. */
-        inline void addCullCallback(NodeCallback* nc) {
+        inline void addCullCallback(Callback* nc) {
             if (nc != NULL) {
                 if (_cullCallback.valid()) _cullCallback->addNestedCallback(nc);
                 else setCullCallback(nc);
@@ -287,7 +287,7 @@ class OSG_EXPORT Node : public Object
         }
 
         /** Convenience method that removes a given callback from a node, even if that callback is nested. There is no error return in case the given callback is not found. */
-        inline void removeCullCallback(NodeCallback* nc) {
+        inline void removeCullCallback(Callback* nc) {
             if (nc != NULL && _cullCallback.valid()) {
                 if (_cullCallback == nc)
                 {
@@ -477,15 +477,15 @@ class OSG_EXPORT Node : public Object
         friend class osg::Drawable;
         friend class osg::StateSet;
 
-        ref_ptr<NodeCallback> _updateCallback;
+        ref_ptr<Callback> _updateCallback;
         unsigned int _numChildrenRequiringUpdateTraversal;
         void setNumChildrenRequiringUpdateTraversal(unsigned int num);
 
-        ref_ptr<NodeCallback> _eventCallback;
+        ref_ptr<Callback> _eventCallback;
         unsigned int _numChildrenRequiringEventTraversal;
         void setNumChildrenRequiringEventTraversal(unsigned int num);
 
-        ref_ptr<NodeCallback> _cullCallback;
+        ref_ptr<Callback> _cullCallback;
 
         bool _cullingActive;
         unsigned int _numChildrenWithCullingDisabled;
diff --git a/include/osg/NodeCallback b/include/osg/NodeCallback
index 4676746ae..0c0b9cbd1 100644
--- a/include/osg/NodeCallback
+++ b/include/osg/NodeCallback
@@ -14,86 +14,7 @@
 #ifndef OSG_NODECALLBACK
 #define OSG_NODECALLBACK 1
 
-#include <osg/Object>
-#include <osg/ref_ptr>
-
-namespace osg {
-
-class Node;
-class NodeVisitor;
-
-class OSG_EXPORT NodeCallback : public virtual Object {
-
-    public :
-
-
-        NodeCallback(){}
-
-        NodeCallback(const NodeCallback& nc,const CopyOp&):
-            _nestedCallback(nc._nestedCallback) {}
-
-
-        META_Object(osg,NodeCallback);
-
-
-        /** Callback method called by the NodeVisitor when visiting a node.*/
-        virtual void operator()(Node* node, NodeVisitor* nv)
-        {
-            // note, callback is responsible for scenegraph traversal so
-            // they must call traverse(node,nv) to ensure that the
-            // scene graph subtree (and associated callbacks) are traversed.
-            traverse(node,nv);
-        }
-
-        /** Call any nested callbacks and then traverse the scene graph. */
-        void traverse(Node* node,NodeVisitor* nv);
-
-        void setNestedCallback(NodeCallback* nc) { _nestedCallback = nc; }
-        NodeCallback* getNestedCallback() { return _nestedCallback.get(); }
-        const NodeCallback* getNestedCallback() const { return _nestedCallback.get(); }
-
-        inline void addNestedCallback(NodeCallback* nc)
-        {
-            if (nc)
-            {
-                if (_nestedCallback.valid())
-                {
-                    _nestedCallback->addNestedCallback(nc);
-                }
-                else
-                {
-                    _nestedCallback = nc;
-                }
-            }
-        }
-
-        inline void removeNestedCallback(NodeCallback* nc)
-        {
-            if (nc)
-            {
-                if (_nestedCallback==nc)
-                {
-                    ref_ptr<NodeCallback> new_nested_callback = _nestedCallback->getNestedCallback();
-                    _nestedCallback->setNestedCallback(0);
-                    _nestedCallback = new_nested_callback;
-                }
-                else if (_nestedCallback.valid())
-                {
-                    _nestedCallback->removeNestedCallback(nc);
-                }
-            }
-        }
-
-    public:
-
-        ref_ptr<NodeCallback> _nestedCallback;
-
-    protected:
-
-        virtual ~NodeCallback() {}
-};
-
-} // namespace
+#include <osg/Callback>
 
 #endif
 
diff --git a/include/osg/NodeTrackerCallback b/include/osg/NodeTrackerCallback
index ed35229f9..ec81cdb81 100644
--- a/include/osg/NodeTrackerCallback
+++ b/include/osg/NodeTrackerCallback
@@ -17,7 +17,6 @@
 #include <iterator>
 
 #include <osg/Node>
-#include <osg/NodeCallback>
 #include <osg/ObserverNodePath>
 
 namespace osg
diff --git a/include/osg/ScriptEngine b/include/osg/ScriptEngine
index 3fa81a954..c382fcd8f 100644
--- a/include/osg/ScriptEngine
+++ b/include/osg/ScriptEngine
@@ -15,20 +15,16 @@
 #define OSG_SCRIPTENGINE 1
 
 #include <osg/Object>
-#include <osg/NodeCallback>
+#include <osg/Callback>
 #include <osg/NodeVisitor>
 #include <osg/UserDataContainer>
 
 namespace osg
 {
 
-typedef std::vector< osg::ref_ptr<osg::Object> > Parameters;
-
-
 // forward declare
 class ScriptEngine;
 
-
 /* Script class for wrapping a script and the language used in the script.*/
 class Script : public osg::Object
 {
@@ -57,53 +53,6 @@ class Script : public osg::Object
         unsigned int _modifiedCount;
 };
 
-/** Callback for attaching a script to a Node's via there UserDataContainer for the purpose of overriding class methods within scripts.*/
-class OSG_EXPORT CallbackObject : public osg::Object
-{
-public:
-    CallbackObject() {}
-    CallbackObject(const std::string& name) { setName(name); }
-    CallbackObject(const CallbackObject& rhs, const osg::CopyOp copyop=osg::CopyOp::SHALLOW_COPY):osg::Object(rhs,copyop) {}
-    META_Object(osg, CallbackObject);
-
-    inline bool run(osg::Object* object) const
-    {
-        osg::Parameters inputParameters;
-        osg::Parameters outputParameters;
-        return run(object, inputParameters, outputParameters);
-    }
-
-    virtual bool run(osg::Object* object, osg::Parameters& inputParameters, osg::Parameters& outputParameters) const;
-
-};
-
-/** Convinience function for getting the CallbackObject associated with specificed name from an Object's UserDataContainer.*/
-inline CallbackObject* getCallbackObject(osg::Object* object, const std::string& name)
-{
-    osg::UserDataContainer* udc = object->getUserDataContainer();
-    return udc ? dynamic_cast<osg::CallbackObject*>(udc->getUserObject(name)) : 0;
-}
-
-/** Call run(..) on named CallbackObjects attached to specified Object. Return true if at least one CallbackObject has been successfully invoked.*/
-inline bool runNamedCallbackObjects(osg::Object* object, const std::string& name, osg::Parameters& inputParameters, osg::Parameters& outputParameters)
-{
-    bool result = false;
-    osg::UserDataContainer* udc = object->getUserDataContainer();
-    if (udc)
-    {
-        for(unsigned int i = 0; i<udc->getNumUserObjects(); ++i)
-        {
-            osg::Object* obj = udc->getUserObject(i);
-            if (obj && obj->getName()==name)
-            {
-                osg::CallbackObject* co = dynamic_cast<osg::CallbackObject*>(obj);
-                if (co) result = co->run(object, inputParameters, outputParameters) | result;
-            }
-        }
-    }
-
-    return result;
-}
 
 /** NodeCallback for attaching a script to a NodeCallback so that it can be called as an update or event callback.*/
 class OSG_EXPORT ScriptNodeCallback : public osg::NodeCallback
diff --git a/include/osg/StateAttribute b/include/osg/StateAttribute
index bf202197b..9b370c971 100644
--- a/include/osg/StateAttribute
+++ b/include/osg/StateAttribute
@@ -16,7 +16,7 @@
 
 #include <osg/Export>
 #include <osg/Object>
-#include <osg/StateAttributeCallback>
+#include <osg/Callback>
 #include <osg/Shader>
 #include <osg/GL>
 
diff --git a/include/osg/StateAttributeCallback b/include/osg/StateAttributeCallback
index 09e38ceb4..5458d4b90 100644
--- a/include/osg/StateAttributeCallback
+++ b/include/osg/StateAttributeCallback
@@ -13,27 +13,6 @@
 #ifndef OSG_STATEATTRIBUTECALLBACK
 #define OSG_STATEATTRIBUTECALLBACK 1
 
-#include <osg/Export>
-#include <osg/Object>
-
-namespace osg {
-
-class StateAttribute;
-class NodeVisitor;
-
-class OSG_EXPORT StateAttributeCallback : public virtual osg::Object
-{
-    public:
-        StateAttributeCallback() {}
-
-        StateAttributeCallback(const StateAttributeCallback&,const CopyOp&) {}
-
-        META_Object(osg,StateAttributeCallback);
-
-        /** do customized update code.*/
-        virtual void operator () (StateAttribute*, NodeVisitor*) {}
-};
-
-}
+#include <osg/Callback>
 
 #endif
diff --git a/include/osg/StateSet b/include/osg/StateSet
index e14398f80..f9b076c17 100644
--- a/include/osg/StateSet
+++ b/include/osg/StateSet
@@ -378,7 +378,7 @@ class OSG_EXPORT StateSet : public Object
         inline bool getNestRenderBins() const { return _nestRenderBins; }
 
 
-        struct Callback : public virtual osg::Object
+        struct Callback : public virtual osg::Callback
         {
             Callback() {}
 
@@ -386,6 +386,9 @@ class OSG_EXPORT StateSet : public Object
 
             META_Object(osg,Callback);
 
+            /** override Callback::run() entry point to adapt to StateAttributeCallback::run(..) method.*/
+            virtual bool run(osg::Object* object, osg::Object* data);
+
             /** do customized callback code.*/
             virtual void operator() (StateSet*, NodeVisitor*) {}
         };
diff --git a/include/osgAnimation/Skeleton b/include/osgAnimation/Skeleton
index c2444da05..6c37e95a8 100644
--- a/include/osgAnimation/Skeleton
+++ b/include/osgAnimation/Skeleton
@@ -17,6 +17,7 @@
 
 #include <osgAnimation/Export>
 #include <osg/MatrixTransform>
+#include <osg/Callback>
 
 namespace osgAnimation
 {
diff --git a/include/osgAnimation/UpdateMatrixTransform b/include/osgAnimation/UpdateMatrixTransform
index b39c80680..e268d54dc 100644
--- a/include/osgAnimation/UpdateMatrixTransform
+++ b/include/osgAnimation/UpdateMatrixTransform
@@ -16,10 +16,10 @@
 #ifndef OSGANIMATION_UPDATE_MATRIX_TRANSFORM
 #define OSGANIMATION_UPDATE_MATRIX_TRANSFORM 1
 
+#include <osg/Callback>
 #include <osgAnimation/Export>
 #include <osgAnimation/AnimationUpdateCallback>
 #include <osgAnimation/StackedTransform>
-#include <osg/NodeCallback>
 
 namespace osgAnimation
 {
diff --git a/include/osgGA/EventHandler b/include/osgGA/EventHandler
index 606b6e386..95b38d04e 100644
--- a/include/osgGA/EventHandler
+++ b/include/osgGA/EventHandler
@@ -16,7 +16,6 @@
 
 #include <vector>
 
-#include <osg/NodeCallback>
 #include <osg/Drawable>
 #include <osg/ApplicationUsage>
 
@@ -37,12 +36,20 @@ public:
 
         EventHandler() {}
         EventHandler(const EventHandler& eh,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
-            osg::Object(eh,copyop),
+            osg::Callback(eh,copyop),
             osg::NodeCallback(eh, copyop),
             osg::Drawable::EventCallback(eh, copyop) {}
 
         META_Object(osgGA, EventHandler);
 
+        virtual bool run(osg::Object* object, osg::Object* data)
+        {
+            osg::Node* node = dynamic_cast<osg::Node*>(object);
+            osg::NodeVisitor* nv = dynamic_cast<osg::NodeVisitor*>(data);
+            operator()(node, nv);
+            return true;
+        }
+
         /** Event traversal node callback method. There is no need to override this method in subclasses of EventHandler as this implementation calls handle(..) for you. */
         virtual void operator()(osg::Node* node, osg::NodeVisitor* nv);
 
diff --git a/include/osgGA/EventVisitor b/include/osgGA/EventVisitor
index e83008b2a..77712555a 100644
--- a/include/osgGA/EventVisitor
+++ b/include/osgGA/EventVisitor
@@ -24,6 +24,7 @@
 #include <osg/Transform>
 #include <osg/Projection>
 #include <osg/OccluderNode>
+#include <osg/ScriptEngine>
 
 #include <osgGA/GUIEventAdapter>
 #include <osgGA/GUIActionAdapter>
@@ -68,8 +69,27 @@ class OSGGA_EXPORT EventVisitor : public osg::NodeVisitor
         /** During traversal each type of node calls its callbacks and its children traversed. */
         virtual void apply(osg::Node& node)         { handle_callbacks_and_traverse(node); }
 
-        virtual void apply(osg::Geode& node)        { handle_geode_callbacks(node); }
-        virtual void apply(osg::Billboard& node)    { handle_geode_callbacks(node); }
+
+        virtual void apply(osg::Drawable& drawable)
+        {
+            osg::Callback* callback = drawable.getEventCallback();
+            if (callback)
+            {
+                osg::Drawable::UpdateCallback* drawable_callback = dynamic_cast<osg::Drawable::UpdateCallback*>(callback);
+                osg::NodeCallback* node_callback = dynamic_cast<osg::NodeCallback*>(callback);
+                osg::CallbackObject* callback_object = dynamic_cast<osg::CallbackObject*>(callback);
+
+                if (drawable_callback) drawable_callback->update(this,&drawable);
+                if (node_callback) (*node_callback)(&drawable, this);
+
+                if ((!drawable_callback && !node_callback) || callback_object)  callback_object->run(&drawable, this);
+            }
+
+            handle_callbacks(drawable.getStateSet());
+        }
+
+        virtual void apply(osg::Geode& node)        { handle_callbacks_and_traverse(node); }
+        virtual void apply(osg::Billboard& node)    { handle_callbacks_and_traverse(node); }
 
         virtual void apply(osg::LightSource& node)  { handle_callbacks_and_traverse(node); }
 
@@ -98,34 +118,11 @@ class OSGGA_EXPORT EventVisitor : public osg::NodeVisitor
         {
             handle_callbacks(node.getStateSet());
 
-            osg::NodeCallback* callback = node.getEventCallback();
-            if (callback) (*callback)(&node,this);
-            else if (node.getNumChildrenRequiringEventTraversal()>0) traverse(node);
+            osg::Callback* callback = node.getEventCallback();
+            if (callback) callback->run(&node,this);
+            else if (node.getNumChildrenRequiringUpdateTraversal()>0) traverse(node);
         }
 
-        inline void handle_geode_callbacks(osg::Geode& node)
-        {
-            handle_callbacks(node.getStateSet());
-
-            osg::NodeCallback* callback = node.getEventCallback();
-            if (callback) (*callback)(&node,this);
-            /*else if (node.getNumChildrenRequiringEventTraversal()>0)*/
-            traverseGeode(node);
-        }
-
-        inline void traverseGeode(osg::Geode& geode)
-        {
-            traverse((osg::Node&)geode);
-
-            // Call the app callbacks on the drawables.
-            for(unsigned int i=0;i<geode.getNumDrawables();++i)
-            {
-                osg::Drawable::EventCallback* callback = geode.getDrawable(i)->getEventCallback();
-                if (callback) callback->event(this,geode.getDrawable(i));
-
-                handle_callbacks(geode.getDrawable(i)->getStateSet());
-            }
-        }
 
         osgGA::GUIActionAdapter*        _actionAdapter;
 
diff --git a/include/osgGA/GUIEventHandler b/include/osgGA/GUIEventHandler
index 547cd3625..1c9fd2e8a 100644
--- a/include/osgGA/GUIEventHandler
+++ b/include/osgGA/GUIEventHandler
@@ -16,7 +16,6 @@
 
 #include <vector>
 
-#include <osg/NodeCallback>
 #include <osg/Drawable>
 #include <osg/ApplicationUsage>
 
@@ -54,7 +53,7 @@ public:
 #if 1
         GUIEventHandler() {}
         GUIEventHandler(const GUIEventHandler& eh,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
-            osg::Object(eh, copyop), EventHandler(eh, copyop) {}
+            osg::Callback(eh, copyop), EventHandler(eh, copyop) {}
 #else
         GUIEventHandler() : _ignoreHandledEventsMask(GUIEventAdapter::NONE) {}
         GUIEventHandler(const GUIEventHandler& eh,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
@@ -123,7 +122,7 @@ protected:
         unsigned int _ignoreHandledEventsMask;
 #endif
 
-protected: 
+protected:
         virtual ~GUIEventHandler();
 
 };
diff --git a/include/osgPresentation/deprecated/AnimationMaterial b/include/osgPresentation/deprecated/AnimationMaterial
index dbf0a72d8..c1b15da92 100644
--- a/include/osgPresentation/deprecated/AnimationMaterial
+++ b/include/osgPresentation/deprecated/AnimationMaterial
@@ -14,7 +14,7 @@
 #define OSG_ANIMATIONMATERIAL 1
 
 #include <osg/Material>
-#include <osg/NodeCallback>
+#include <osg/Callback>
 
 #include <osgPresentation/Export>
 
diff --git a/include/osgPresentation/deprecated/PropertyManager b/include/osgPresentation/deprecated/PropertyManager
index a0154fa3c..91641c091 100644
--- a/include/osgPresentation/deprecated/PropertyManager
+++ b/include/osgPresentation/deprecated/PropertyManager
@@ -15,7 +15,6 @@
 
 #include <osg/UserDataContainer>
 #include <osg/ValueObject>
-#include <osg/NodeCallback>
 #include <osg/ImageSequence>
 #include <osgGA/GUIEventHandler>
 
@@ -29,13 +28,13 @@ namespace osgPresentation
 class PropertyManager : protected osg::Object
 {
 public:
-    
+
     PropertyManager() {}
     PropertyManager(const PropertyManager& pm, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
         osg::Object(pm,copyop) {}
 
     META_Object(osgPresentation, PropertyManager)
-    
+
     /** Convinience method that casts the named UserObject to osg::TemplateValueObject<T> and gets the value.
         * To use this template method you need to include the osg/ValueObject header.*/
     template<typename T>
@@ -57,7 +56,7 @@ public:
 
     int ref() const { return osg::Referenced::ref(); }
     int unref() const { return osg::Referenced::unref(); }
-    
+
 protected:
 
     mutable OpenThreads::Mutex _mutex;
@@ -125,7 +124,7 @@ struct PropertyReader
 
     bool                _errorGenerated;
     osg::NodePath       _nodePath;
-    std::istringstream  _sstream;    
+    std::istringstream  _sstream;
 };
 
 
@@ -176,7 +175,7 @@ protected:
     double      _latestTime;
     bool        _pause;
     double      _pauseTime;
-    
+
 };
 
 
diff --git a/include/osgShadow/MinimalDrawBoundsShadowMap b/include/osgShadow/MinimalDrawBoundsShadowMap
index 2c85b3498..65e66622c 100644
--- a/include/osgShadow/MinimalDrawBoundsShadowMap
+++ b/include/osgShadow/MinimalDrawBoundsShadowMap
@@ -98,28 +98,30 @@ class OSGSHADOW_EXPORT MinimalDrawBoundsShadowMap
             osg::observer_ptr< ViewData > _vd;
         };
 
-        struct CameraCullCallback: public osg::NodeCallback {
+        struct CameraCullCallback: public osg::Callback {
 
-            CameraCullCallback(ViewData * vd, osg::NodeCallback * nc): _vd(vd), _nc(nc)
+            CameraCullCallback(ViewData * vd, osg::Callback * nc): _vd(vd), _nc(nc)
             {
             }
 
-            virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
+            virtual bool run(osg::Object* object, osg::Object* data)
             {
-                osgUtil::CullVisitor *cv = dynamic_cast< osgUtil::CullVisitor *>( nv );
+                osgUtil::CullVisitor *cv = dynamic_cast< osgUtil::CullVisitor *>( data );
 
                 if( _nc.valid() )
-                    _nc->operator()(node,nv);
+                    _nc->run(object, data);
                 else
-                    traverse(node,nv);
+                    traverse(object, data);
 
                 if( cv )
                     _vd->recordShadowMapParams( );
+
+                return true;
             }
 
         protected:
             osg::observer_ptr< ViewData >     _vd;
-            osg::ref_ptr< osg::NodeCallback > _nc;
+            osg::ref_ptr< osg::Callback >       _nc;
         };
 };
 
diff --git a/include/osgUtil/CullVisitor b/include/osgUtil/CullVisitor
index 93fd8a28f..b824c1e4c 100644
--- a/include/osgUtil/CullVisitor
+++ b/include/osgUtil/CullVisitor
@@ -309,15 +309,15 @@ class OSGUTIL_EXPORT CullVisitor : public osg::NodeVisitor, public osg::CullStac
 
         inline void handle_cull_callbacks_and_traverse(osg::Node& node)
         {
-            osg::NodeCallback* callback = node.getCullCallback();
-            if (callback) (*callback)(&node,this);
+            osg::Callback* callback = node.getCullCallback();
+            if (callback) callback->run(&node,this);
             else traverse(node);
         }
 
         inline void handle_cull_callbacks_and_accept(osg::Node& node,osg::Node* acceptNode)
         {
-            osg::NodeCallback* callback = node.getCullCallback();
-            if (callback) (*callback)(&node,this);
+            osg::Callback* callback = node.getCullCallback();
+            if (callback) callback->run(&node,this);
             else acceptNode->accept(*this);
         }
 
diff --git a/include/osgUtil/TransformCallback b/include/osgUtil/TransformCallback
index 9ae5616be..6acd4ded0 100644
--- a/include/osgUtil/TransformCallback
+++ b/include/osgUtil/TransformCallback
@@ -15,7 +15,7 @@
 #ifndef OSGUTIL_TRANSFORMCALLBACK
 #define OSGUTIL_TRANSFORMCALLBACK 1
 
-#include <osg/Node>
+#include <osg/Callback>
 #include <osgUtil/Export>
 
 namespace osgUtil
diff --git a/include/osgUtil/UpdateVisitor b/include/osgUtil/UpdateVisitor
index 799df2524..ed4a62703 100644
--- a/include/osgUtil/UpdateVisitor
+++ b/include/osgUtil/UpdateVisitor
@@ -15,7 +15,6 @@
 #define OSGUTIL_UPDATEVISITOR 1
 
 #include <osg/NodeVisitor>
-#include <osg/Node>
 #include <osg/Geode>
 #include <osg/Billboard>
 #include <osg/LOD>
@@ -24,6 +23,7 @@
 #include <osg/Transform>
 #include <osg/Projection>
 #include <osg/OccluderNode>
+#include <osg/ScriptEngine>
 
 #include <osgUtil/Export>
 
@@ -50,17 +50,24 @@ class OSGUTIL_EXPORT UpdateVisitor : public osg::NodeVisitor
 
         virtual void apply(osg::Drawable& drawable)
         {
-            osg::Drawable::UpdateCallback* callback = drawable.getUpdateCallback();
-            if (callback) callback->update(this,&drawable);
+            osg::Callback* callback = drawable.getUpdateCallback();
+            if (callback)
+            {
+                osg::Drawable::UpdateCallback* drawable_callback = dynamic_cast<osg::Drawable::UpdateCallback*>(callback);
+                osg::NodeCallback* node_callback = dynamic_cast<osg::NodeCallback*>(callback);
+                osg::CallbackObject* callback_object = dynamic_cast<osg::CallbackObject*>(callback);
 
-            osg::NodeCallback* node_callback = drawable.osg::Node::getUpdateCallback();
-            if (node_callback) (*node_callback)(&drawable, this);
+                if (drawable_callback) drawable_callback->update(this,&drawable);
+                if (node_callback) (*node_callback)(&drawable, this);
+
+                if ((!drawable_callback && !node_callback) || callback_object)  callback_object->run(&drawable, this);
+            }
 
             handle_callbacks(drawable.getStateSet());
         }
 
-        virtual void apply(osg::Geode& node)        { handle_geode_callbacks(node); }
-        virtual void apply(osg::Billboard& node)    { handle_geode_callbacks(node); }
+        virtual void apply(osg::Geode& node)        { handle_callbacks_and_traverse(node); }
+        virtual void apply(osg::Billboard& node)    { handle_callbacks_and_traverse(node); }
 
         virtual void apply(osg::LightSource& node)  { handle_callbacks_and_traverse(node); }
 
@@ -92,31 +99,10 @@ class OSGUTIL_EXPORT UpdateVisitor : public osg::NodeVisitor
         {
             handle_callbacks(node.getStateSet());
 
-            osg::NodeCallback* callback = node.getUpdateCallback();
-            if (callback) (*callback)(&node,this);
+            osg::Callback* callback = node.getUpdateCallback();
+            if (callback) callback->run(&node,this);
             else if (node.getNumChildrenRequiringUpdateTraversal()>0) traverse(node);
         }
-
-        inline void handle_geode_callbacks(osg::Geode& geode)
-        {
-            handle_callbacks(geode.getStateSet());
-
-            osg::NodeCallback* callback = geode.getUpdateCallback();
-            if (callback) (*callback)(&geode,this);
-
-            // Call the app callbacks on the drawables.
-            for(unsigned int i=0;i<geode.getNumDrawables();++i)
-            {
-                osg::Drawable::UpdateCallback* callback = geode.getDrawable(i)->getUpdateCallback();
-                if (callback) callback->update(this,geode.getDrawable(i));
-
-                handle_callbacks(geode.getDrawable(i)->getStateSet());
-            }
-
-            // should we traverse just in case a subclass of Geode adds children??  Won't for now as
-            // Geode's arn't designed to have children.
-            // traverse(geode);
-        }
 };
 
 }
diff --git a/include/osgViewer/ViewerEventHandlers b/include/osgViewer/ViewerEventHandlers
index c2458a85f..5701a4c12 100644
--- a/include/osgViewer/ViewerEventHandlers
+++ b/include/osgViewer/ViewerEventHandlers
@@ -525,7 +525,7 @@ protected:
     InteractiveImageHandler() {}
 
     InteractiveImageHandler(const InteractiveImageHandler&,const osg::CopyOp& = osg::CopyOp::SHALLOW_COPY):
-        osg::Object(), osgGA::GUIEventHandler(), osg::Drawable::CullCallback(), _fullscreen(false) {}
+        osg::Callback(), osgGA::GUIEventHandler(), osg::Drawable::CullCallback(), _fullscreen(false) {}
 
     bool mousePosition(osgViewer::View* view, osg::NodeVisitor* nv, const osgGA::GUIEventAdapter& ea, int& x, int &y) const;
 
diff --git a/include/osgVolume/Property b/include/osgVolume/Property
index 0af6dd8d2..9a6743b2a 100644
--- a/include/osgVolume/Property
+++ b/include/osgVolume/Property
@@ -447,7 +447,9 @@ class OSGVOLUME_EXPORT PropertyAdjustmentCallback : public osgGA::GUIEventHandle
 
         PropertyAdjustmentCallback(const PropertyAdjustmentCallback&,const osg::CopyOp&);
 
-        META_Object(osgVolume,PropertyAdjustmentCallback);
+        META_Object(osgVolume, PropertyAdjustmentCallback);
+
+        virtual bool run(osg::Object* object, osg::Object* data) { return osgGA::GUIEventHandler::run(object, data); }
 
         void setKeyEventCycleForward(int key) { _cyleForwardKey = key; }
         int getKeyEventCycleForward() const { return _cyleForwardKey; }
diff --git a/src/osg/CMakeLists.txt b/src/osg/CMakeLists.txt
index b82869d5f..a7e93dfcd 100644
--- a/src/osg/CMakeLists.txt
+++ b/src/osg/CMakeLists.txt
@@ -37,6 +37,7 @@ SET(TARGET_H
     ${HEADER_PATH}/buffered_value
     ${HEADER_PATH}/BufferIndexBinding
     ${HEADER_PATH}/BufferObject
+    ${HEADER_PATH}/Callback
     ${HEADER_PATH}/Camera
     ${HEADER_PATH}/CameraView
     ${HEADER_PATH}/ClampColor
@@ -230,6 +231,7 @@ SET(TARGET_SRC
     BlendFunc.cpp
     BufferIndexBinding.cpp
     BufferObject.cpp
+    Callback.cpp
     Camera.cpp
     CameraView.cpp
     ClampColor.cpp
@@ -296,7 +298,6 @@ SET(TARGET_SRC
     #    Matrix_implementation.cpp
     MatrixTransform.cpp
     Multisample.cpp
-    NodeCallback.cpp
     Node.cpp
     NodeTrackerCallback.cpp
     NodeVisitor.cpp
diff --git a/src/osg/Callback.cpp b/src/osg/Callback.cpp
new file mode 100644
index 000000000..e6711cca0
--- /dev/null
+++ b/src/osg/Callback.cpp
@@ -0,0 +1,109 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
+ *
+ * This library is open source and may be redistributed and/or modified under
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * OpenSceneGraph Public License for more details.
+*/
+#include <osg/Node>
+#include <osg/NodeVisitor>
+#include <osg/ScriptEngine>
+
+using namespace osg;
+
+/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// Callback
+//
+bool Callback::traverse(Object* object, Object* data)
+{
+    if (_nestedCallback.valid()) return run(object, data);
+    else
+    {
+#if 1
+        osg::Node* node = dynamic_cast<osg::Node*>(object);
+        osg::NodeVisitor* nv = dynamic_cast<osg::NodeVisitor*>(data);
+#else
+        osg::Node* node = object ? data->asNode() : 0;
+        osg::NodeVisitor* nv = data ? data->asNodeVisitor() : 0;
+#endif
+        if (node && nv)
+        {
+            nv->traverse(*node);
+            return true;
+        }
+        else return false;
+    }
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// CallbackObject
+//
+bool CallbackObject::run(osg::Object* object, osg::Object* data)
+{
+    osg::Parameters inputParameters, outputParameters;
+
+    if (data && data->referenceCount()>=1)
+    {
+        inputParameters.push_back(data);
+    }
+
+    return run(object,inputParameters, outputParameters);
+}
+
+bool CallbackObject::run(osg::Object* object, osg::Parameters& inputParameters, osg::Parameters& outputParameters) const
+{
+    OSG_NOTICE<<"CallbackObject::run(object="<<object<<")"<<std::endl;
+    return false;
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// NodeCallback
+//
+bool NodeCallback::run(osg::Object* object, osg::Object* data)
+{
+    osg::Node* node = dynamic_cast<osg::Node*>(object);
+    osg::NodeVisitor* nv = dynamic_cast<osg::NodeVisitor*>(data);
+    if (node && nv)
+    {
+        operator()(node, nv);
+        return true;
+    }
+    else
+    {
+        return traverse(object, data);
+    }
+}
+void NodeCallback::operator()(Node* node, NodeVisitor* nv)
+{
+    // note, callback is responsible for scenegraph traversal so
+    // they must call traverse(node,nv) to ensure that the
+    // scene graph subtree (and associated callbacks) are traversed.
+    traverse(node,nv);
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// StateAttributeCallback
+//
+bool StateAttributeCallback::run(osg::Object* object, osg::Object* data)
+{
+    osg::StateAttribute* sa = dynamic_cast<osg::StateAttribute*>(object);
+    osg::NodeVisitor* nv = dynamic_cast<osg::NodeVisitor*>(data);
+    if (sa && nv)
+    {
+        operator()(sa, nv);
+        return true;
+    }
+    else
+    {
+        return traverse(object, data);
+    }
+}
diff --git a/src/osg/CopyOp.cpp b/src/osg/CopyOp.cpp
index 6a5a360b5..50e801d57 100644
--- a/src/osg/CopyOp.cpp
+++ b/src/osg/CopyOp.cpp
@@ -19,6 +19,7 @@
 #include <osg/PrimitiveSet>
 #include <osg/Shape>
 #include <osg/StateAttribute>
+#include <osg/Callback>
 
 using namespace osg;
 
@@ -66,19 +67,19 @@ StateAttribute* CopyOp::operator() (const StateAttribute* attr) const
         return const_cast<StateAttribute*>(attr);
 }
 
-NodeCallback* CopyOp::operator() (const NodeCallback* nc) const
+Callback* CopyOp::operator() (const Callback* nc) const
 {
     if (nc && _flags&DEEP_COPY_CALLBACKS)
     {
         // deep copy the full chain of callback
-        osg::NodeCallback* first = osg::clone(nc, *this);
+        Callback* first = osg::clone(nc, *this);
         if (!first) return 0;
 
         first->setNestedCallback(0);
         nc = nc->getNestedCallback();
         while (nc)
         {
-            osg::NodeCallback* ucb = osg::clone(nc, *this);
+            Callback* ucb = osg::clone(nc, *this);
             if (ucb)
             {
                 ucb->setNestedCallback(0);
@@ -89,5 +90,5 @@ NodeCallback* CopyOp::operator() (const NodeCallback* nc) const
         return first;
     }
     else
-        return const_cast<NodeCallback*>(nc);
+        return const_cast<Callback*>(nc);
 }
diff --git a/src/osg/Drawable.cpp b/src/osg/Drawable.cpp
index c32a2edc3..765bb2d64 100644
--- a/src/osg/Drawable.cpp
+++ b/src/osg/Drawable.cpp
@@ -216,6 +216,36 @@ void Drawable::flushDeletedDisplayLists(unsigned int contextID, double& availabl
 #endif
 }
 
+bool Drawable::UpdateCallback::run(osg::Object* object, osg::Object* data)
+{
+    osg::Drawable* drawable = dynamic_cast<osg::Drawable*>(object);
+    osg::NodeVisitor* nv = dynamic_cast<osg::NodeVisitor*>(data);
+    if (drawable && nv)
+    {
+        update(nv, drawable);
+        return true;
+    }
+    else
+    {
+        return traverse(object, data);
+    }
+}
+
+bool Drawable::EventCallback::run(osg::Object* object, osg::Object* data)
+{
+    osg::Drawable* drawable = dynamic_cast<osg::Drawable*>(object);
+    osg::NodeVisitor* nv = dynamic_cast<osg::NodeVisitor*>(data);
+    if (drawable && nv)
+    {
+        event(nv, drawable);
+        return true;
+    }
+    else
+    {
+        return traverse(object, data);
+    }
+}
+
 Drawable::Drawable()
 {
     _boundingBoxComputed = false;
@@ -468,48 +498,6 @@ void Drawable::dirtyDisplayList()
 }
 
 
-void Drawable::setUpdateCallback(UpdateCallback* ac)
-{
-    if (_drawableUpdateCallback==ac) return;
-
-    int delta = 0;
-    if (_drawableUpdateCallback.valid()) --delta;
-    if (ac) ++delta;
-
-    _drawableUpdateCallback = ac;
-
-    if (delta!=0 && !(_stateset.valid() && _stateset->requiresUpdateTraversal()))
-    {
-        for(ParentList::iterator itr=_parents.begin();
-            itr!=_parents.end();
-            ++itr)
-        {
-            (*itr)->setNumChildrenRequiringUpdateTraversal((*itr)->getNumChildrenRequiringUpdateTraversal()+delta);
-        }
-    }
-}
-
-void Drawable::setEventCallback(EventCallback* ac)
-{
-    if (_drawableEventCallback==ac) return;
-
-    int delta = 0;
-    if (_drawableEventCallback.valid()) --delta;
-    if (ac) ++delta;
-
-    _drawableEventCallback = ac;
-
-    if (delta!=0 && !(_stateset.valid() && _stateset->requiresEventTraversal()))
-    {
-        for(ParentList::iterator itr=_parents.begin();
-            itr!=_parents.end();
-            ++itr)
-        {
-            (*itr)->setNumChildrenRequiringEventTraversal( (*itr)->getNumChildrenRequiringEventTraversal()+delta );
-        }
-    }
-}
-
 struct ComputeBound : public PrimitiveFunctor
 {
         ComputeBound()
diff --git a/src/osg/Node.cpp b/src/osg/Node.cpp
index e1783ad91..e7ac56f48 100644
--- a/src/osg/Node.cpp
+++ b/src/osg/Node.cpp
@@ -203,7 +203,7 @@ MatrixList Node::getWorldMatrices(const osg::Node* haltTraversalAtNode) const
     return matrices;
 }
 
-void Node::setUpdateCallback(NodeCallback* nc)
+void Node::setUpdateCallback(Callback* nc)
 {
     // if no changes just return.
     if (_updateCallback==nc) return;
@@ -281,7 +281,7 @@ void Node::setNumChildrenRequiringUpdateTraversal(unsigned int num)
 }
 
 
-void Node::setEventCallback(NodeCallback* nc)
+void Node::setEventCallback(Callback* nc)
 {
     // if no changes just return.
     if (_eventCallback==nc) return;
diff --git a/src/osg/NodeCallback.cpp b/src/osg/NodeCallback.cpp
deleted file mode 100644
index 8c59416a3..000000000
--- a/src/osg/NodeCallback.cpp
+++ /dev/null
@@ -1,23 +0,0 @@
-/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
- *
- * This library is open source and may be redistributed and/or modified under
- * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
- * (at your option) any later version.  The full license is in LICENSE file
- * included with this distribution, and on the openscenegraph.org website.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * OpenSceneGraph Public License for more details.
-*/
-#include <osg/Node>
-#include <osg/NodeCallback>
-#include <osg/NodeVisitor>
-
-using namespace osg;
-
-void NodeCallback::traverse(Node* node,NodeVisitor* nv)
-{
-    if (_nestedCallback.valid()) (*_nestedCallback)(node,nv);
-    else nv->traverse(*node);
-}
diff --git a/src/osg/ScriptEngine.cpp b/src/osg/ScriptEngine.cpp
index 8e6db5c24..183b3711f 100644
--- a/src/osg/ScriptEngine.cpp
+++ b/src/osg/ScriptEngine.cpp
@@ -16,13 +16,6 @@
 
 using namespace osg;
 
-
-bool CallbackObject::run(osg::Object* object, osg::Parameters& inputParameters, osg::Parameters& outputParameters) const
-{
-    OSG_NOTICE<<"CallbackObject::run(object="<<object<<")"<<std::endl;
-    return false;
-}
-
 ScriptEngine* ScriptNodeCallback::getScriptEngine(osg::NodePath& nodePath)
 {
     if (!_script) return 0;
diff --git a/src/osg/StateAttribute.cpp b/src/osg/StateAttribute.cpp
index 6df381a73..158a07a00 100644
--- a/src/osg/StateAttribute.cpp
+++ b/src/osg/StateAttribute.cpp
@@ -12,6 +12,7 @@
 #include <osg/StateAttribute>
 #include <osg/StateSet>
 #include <osg/State>
+#include <osg/NodeVisitor>
 #include <osg/Notify>
 
 #include <algorithm>
diff --git a/src/osg/StateSet.cpp b/src/osg/StateSet.cpp
index fbd4d7145..7f01c7654 100644
--- a/src/osg/StateSet.cpp
+++ b/src/osg/StateSet.cpp
@@ -84,6 +84,26 @@ bool osg::isTextureMode(StateAttribute::GLMode mode)
     return getTextureGLModeSet().isTextureMode(mode);
 }
 
+
+/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// StateAttributeCallback
+//
+bool StateSet::Callback::run(osg::Object* object, osg::Object* data)
+{
+    osg::StateSet* ss = dynamic_cast<osg::StateSet*>(object);
+    osg::NodeVisitor* nv = dynamic_cast<osg::NodeVisitor*>(data);
+    if (ss && nv)
+    {
+        operator()(ss, nv);
+        return true;
+    }
+    else
+    {
+        return traverse(object, data);
+    }
+}
+
 StateSet::StateSet():
     Object(true),
     _nestRenderBins(true)
diff --git a/src/osgAnimation/AnimationManagerBase.cpp b/src/osgAnimation/AnimationManagerBase.cpp
index 06ce5756f..03e9b2abb 100644
--- a/src/osgAnimation/AnimationManagerBase.cpp
+++ b/src/osgAnimation/AnimationManagerBase.cpp
@@ -62,7 +62,7 @@ void AnimationManagerBase::operator()(osg::Node* node, osg::NodeVisitor* nv)
 }
 
 
-AnimationManagerBase::AnimationManagerBase(const AnimationManagerBase& b, const osg::CopyOp& copyop) : osg::Object(b, copyop), osg::NodeCallback(b,copyop) // TODO check this
+AnimationManagerBase::AnimationManagerBase(const AnimationManagerBase& b, const osg::CopyOp& copyop) : osg::Callback(b, copyop), osg::NodeCallback(b,copyop) // TODO check this
 {
     const AnimationList& animationList = b.getAnimationList();
     for (AnimationList::const_iterator it = animationList.begin();
diff --git a/src/osgAnimation/LinkVisitor.cpp b/src/osgAnimation/LinkVisitor.cpp
index 1dc4f67c1..45efc6e78 100644
--- a/src/osgAnimation/LinkVisitor.cpp
+++ b/src/osgAnimation/LinkVisitor.cpp
@@ -64,7 +64,7 @@ void LinkVisitor::apply(osg::Node& node)
     if (st)
         handle_stateset(st);
 
-    osg::NodeCallback* cb = node.getUpdateCallback();
+    osg::Callback* cb = node.getUpdateCallback();
     while (cb)
     {
         osgAnimation::AnimationUpdateCallbackBase* cba = dynamic_cast<osgAnimation::AnimationUpdateCallbackBase*>(cb);
diff --git a/src/osgAnimation/StatsHandler.cpp b/src/osgAnimation/StatsHandler.cpp
index e282c4cda..4508e9d55 100644
--- a/src/osgAnimation/StatsHandler.cpp
+++ b/src/osgAnimation/StatsHandler.cpp
@@ -466,7 +466,7 @@ struct FindTimelineStats : public osg::NodeVisitor
     FindTimelineStats() : osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) {}
 
     void apply(osg::Node& node) {
-        osg::NodeCallback* cb = node.getUpdateCallback();
+        osg::Callback* cb = node.getUpdateCallback();
         while (cb) {
             osgAnimation::TimelineAnimationManager* tam = dynamic_cast<osgAnimation::TimelineAnimationManager*>(cb);
             if (tam)
diff --git a/src/osgGA/CameraManipulator.cpp b/src/osgGA/CameraManipulator.cpp
index 9646f2149..549b631f6 100644
--- a/src/osgGA/CameraManipulator.cpp
+++ b/src/osgGA/CameraManipulator.cpp
@@ -21,7 +21,7 @@ CameraManipulator::CameraManipulator()
 
 
 CameraManipulator::CameraManipulator(const CameraManipulator& mm, const CopyOp& copyOp)
-   : osg::Object(mm, copyOp),
+   : osg::Callback(mm, copyOp),
      inherited(mm, copyOp),
      _intersectTraversalMask(mm._intersectTraversalMask),
      _autoComputeHomePosition(mm._autoComputeHomePosition),
diff --git a/src/osgGA/FirstPersonManipulator.cpp b/src/osgGA/FirstPersonManipulator.cpp
index 39801b597..1596928c1 100644
--- a/src/osgGA/FirstPersonManipulator.cpp
+++ b/src/osgGA/FirstPersonManipulator.cpp
@@ -44,7 +44,7 @@ FirstPersonManipulator::FirstPersonManipulator( int flags )
 
 /// Constructor.
 FirstPersonManipulator::FirstPersonManipulator( const FirstPersonManipulator& fpm, const CopyOp& copyOp )
-   : osg::Object(fpm, copyOp),
+   : osg::Callback(fpm, copyOp),
      inherited( fpm, copyOp ),
      _eye( fpm._eye ),
      _rotation( fpm._rotation ),
diff --git a/src/osgGA/FlightManipulator.cpp b/src/osgGA/FlightManipulator.cpp
index 2c31a045a..1d5e81ba9 100644
--- a/src/osgGA/FlightManipulator.cpp
+++ b/src/osgGA/FlightManipulator.cpp
@@ -28,7 +28,7 @@ FlightManipulator::FlightManipulator( int flags )
 
 /// Constructor.
 FlightManipulator::FlightManipulator( const FlightManipulator& fm, const CopyOp& copyOp )
-    : osg::Object(fm, copyOp),
+    : osg::Callback(fm, copyOp),
       inherited( fm, copyOp ),
       _yawMode( fm._yawMode )
 {
diff --git a/src/osgGA/MultiTouchTrackballManipulator.cpp b/src/osgGA/MultiTouchTrackballManipulator.cpp
index 14e808536..fa2c0ee5e 100644
--- a/src/osgGA/MultiTouchTrackballManipulator.cpp
+++ b/src/osgGA/MultiTouchTrackballManipulator.cpp
@@ -30,7 +30,7 @@ MultiTouchTrackballManipulator::MultiTouchTrackballManipulator( int flags )
 
 /// Constructor.
 MultiTouchTrackballManipulator::MultiTouchTrackballManipulator( const MultiTouchTrackballManipulator& tm, const CopyOp& copyOp )
-    : osg::Object(tm, copyOp), inherited( tm, copyOp )
+    : osg::Callback(tm, copyOp), inherited( tm, copyOp )
 {
 }
 
diff --git a/src/osgGA/NodeTrackerManipulator.cpp b/src/osgGA/NodeTrackerManipulator.cpp
index 0155813af..da829799d 100644
--- a/src/osgGA/NodeTrackerManipulator.cpp
+++ b/src/osgGA/NodeTrackerManipulator.cpp
@@ -30,7 +30,7 @@ NodeTrackerManipulator::NodeTrackerManipulator( int flags )
 
 
 NodeTrackerManipulator::NodeTrackerManipulator( const NodeTrackerManipulator& m, const CopyOp& copyOp )
-    : osg::Object(m, copyOp),
+    : osg::Callback(m, copyOp),
       inherited( m, copyOp ),
       _trackNodePath( m._trackNodePath ),
       _trackerMode( m._trackerMode )
diff --git a/src/osgGA/OrbitManipulator.cpp b/src/osgGA/OrbitManipulator.cpp
index 1ee5af221..59a5a9039 100644
--- a/src/osgGA/OrbitManipulator.cpp
+++ b/src/osgGA/OrbitManipulator.cpp
@@ -43,7 +43,7 @@ OrbitManipulator::OrbitManipulator( int flags )
 
 /// Constructor.
 OrbitManipulator::OrbitManipulator( const OrbitManipulator& om, const CopyOp& copyOp )
-   : osg::Object(om, copyOp),
+   : osg::Callback(om, copyOp),
      inherited( om, copyOp ),
      _center( om._center ),
      _rotation( om._rotation ),
diff --git a/src/osgGA/StandardManipulator.cpp b/src/osgGA/StandardManipulator.cpp
index b7dfc0516..dcbc5dcfb 100644
--- a/src/osgGA/StandardManipulator.cpp
+++ b/src/osgGA/StandardManipulator.cpp
@@ -48,7 +48,7 @@ StandardManipulator::StandardManipulator( int flags )
 
 /// Constructor.
 StandardManipulator::StandardManipulator( const StandardManipulator& uim, const CopyOp& copyOp )
-    : osg::Object(uim, copyOp),
+    : osg::Callback(uim, copyOp),
      inherited( uim, copyOp ),
      _thrown( uim._thrown ),
      _allowThrow( uim._allowThrow ),
diff --git a/src/osgGA/TerrainManipulator.cpp b/src/osgGA/TerrainManipulator.cpp
index 928dc5118..4c38e9605 100644
--- a/src/osgGA/TerrainManipulator.cpp
+++ b/src/osgGA/TerrainManipulator.cpp
@@ -29,7 +29,7 @@ TerrainManipulator::TerrainManipulator( int flags )
 
 /// Constructor.
 TerrainManipulator::TerrainManipulator( const TerrainManipulator& tm, const CopyOp& copyOp )
-    : osg::Object(tm, copyOp),
+    : osg::Callback(tm, copyOp),
       inherited( tm, copyOp ),
       _previousUp( tm._previousUp )
 {
diff --git a/src/osgGA/TrackballManipulator.cpp b/src/osgGA/TrackballManipulator.cpp
index 8448a9cac..408eaea33 100644
--- a/src/osgGA/TrackballManipulator.cpp
+++ b/src/osgGA/TrackballManipulator.cpp
@@ -28,7 +28,7 @@ TrackballManipulator::TrackballManipulator( int flags )
 
 /// Constructor.
 TrackballManipulator::TrackballManipulator( const TrackballManipulator& tm, const CopyOp& copyOp )
-    : osg::Object(tm, copyOp),
+    : osg::Callback(tm, copyOp),
       inherited( tm, copyOp )
 {
 }
diff --git a/src/osgPlugins/bvh/ReaderWriterBVH.cpp b/src/osgPlugins/bvh/ReaderWriterBVH.cpp
index 88e21e1bb..4a425fce2 100644
--- a/src/osgPlugins/bvh/ReaderWriterBVH.cpp
+++ b/src/osgPlugins/bvh/ReaderWriterBVH.cpp
@@ -46,7 +46,7 @@ public:
                 parent->setMatrixInSkeletonSpace( osg::Matrix::translate(offset) *
                                                   parent->getMatrixInSkeletonSpace() );
                 osgAnimation::UpdateBone* updateBone =
-                    static_cast<osgAnimation::UpdateBone*>( parent->getUpdateCallback() );
+                    dynamic_cast<osgAnimation::UpdateBone*>( parent->getUpdateCallback() );
                 if ( updateBone )
                 {
                     osgAnimation::StackedTransform& stack = updateBone->getStackedTransforms();
diff --git a/src/osgPlugins/dae/daeRAnimations.cpp b/src/osgPlugins/dae/daeRAnimations.cpp
index 8dfbd8a25..63ef93382 100644
--- a/src/osgPlugins/dae/daeRAnimations.cpp
+++ b/src/osgPlugins/dae/daeRAnimations.cpp
@@ -758,7 +758,7 @@ daeReader::ChannelPart* daeReader::processSampler(domChannel* pDomChannel, Sourc
     return NULL;
 }
 
-osgAnimation::Target* findChannelTarget(osg::NodeCallback* nc, const std::string& targetName, bool& rotation)
+osgAnimation::Target* findChannelTarget(osg::Callback* nc, const std::string& targetName, bool& rotation)
 {
     if (osgAnimation::UpdateMatrixTransform* umt = dynamic_cast<osgAnimation::UpdateMatrixTransform*>(nc))
     {
@@ -827,7 +827,7 @@ void daeReader::processChannel(domChannel* pDomChannel, SourceMap& sources, Targ
             domChannelOsgAnimationUpdateCallbackMap::iterator iter = _domChannelOsgAnimationUpdateCallbackMap.find(pDomChannel);
             if (iter != _domChannelOsgAnimationUpdateCallbackMap.end())
             {
-                osg::NodeCallback* nc = iter->second.get();
+                osg::Callback* nc = iter->second.get();
 
                 std::string channelName, targetName, componentName;
                 extractTargetName(pDomChannel->getTarget(), channelName, targetName, componentName);
diff --git a/src/osgPlugins/dae/daeRTransforms.cpp b/src/osgPlugins/dae/daeRTransforms.cpp
index a656c50dc..3c69cae96 100644
--- a/src/osgPlugins/dae/daeRTransforms.cpp
+++ b/src/osgPlugins/dae/daeRTransforms.cpp
@@ -44,7 +44,7 @@ osg::Transform* daeReader::processOsgMatrixTransform(domNode *node, bool isBone)
         resultNode = new osg::MatrixTransform;
     }
 
-    osg::NodeCallback* pNodeCallback = resultNode->getUpdateCallback();
+    osg::Callback* pNodeCallback = resultNode->getUpdateCallback();
     std::vector<osg::ref_ptr<osgAnimation::StackedTransformElement> > transformElements;
     osg::ref_ptr<osgAnimation::StackedTransformElement> pLastStaticTransformElement;
 
diff --git a/src/osgPlugins/dae/daeReader.h b/src/osgPlugins/dae/daeReader.h
index 7b28d14d7..5c051cf65 100644
--- a/src/osgPlugins/dae/daeReader.h
+++ b/src/osgPlugins/dae/daeReader.h
@@ -241,7 +241,7 @@ public:
     typedef std::map<domMaterial*, osg::ref_ptr<osg::StateSet> > domMaterialStateSetMap;
     typedef std::map<std::string, osg::ref_ptr<osg::StateSet> >    MaterialStateSetMap;
     typedef std::multimap< daeElement*, domChannel*> daeElementDomChannelMap;
-    typedef std::map<domChannel*, osg::ref_ptr<osg::NodeCallback> > domChannelOsgAnimationUpdateCallbackMap;
+    typedef std::map<domChannel*, osg::ref_ptr<osg::Callback> > domChannelOsgAnimationUpdateCallbackMap;
     typedef std::map<domNode*, osg::ref_ptr<osgAnimation::Bone> > domNodeOsgBoneMap;
     typedef std::map<domNode*, osg::ref_ptr<osgAnimation::Skeleton> > domNodeOsgSkeletonMap;
     typedef std::map<TextureParameters, osg::ref_ptr<osg::Texture2D> > TextureParametersMap;
diff --git a/src/osgPlugins/dae/daeWAnimations.cpp b/src/osgPlugins/dae/daeWAnimations.cpp
index 2f9540a85..ef1777e3a 100644
--- a/src/osgPlugins/dae/daeWAnimations.cpp
+++ b/src/osgPlugins/dae/daeWAnimations.cpp
@@ -37,7 +37,7 @@ using namespace osgDAE;
 void daeWriter::writeAnimations( osg::Node &node )
 {
     const std::string nodeNameUTF( _pluginOptions.namesUseCodepage ? osgDB::convertStringFromCurrentCodePageToUTF8(node.getName()) : node.getName() );
-    osg::NodeCallback* ncb = node.getUpdateCallback();
+    osg::Callback* ncb = node.getUpdateCallback();
     if (ncb)
     {
         osgAnimation::AnimationManagerBase* am = dynamic_cast<osgAnimation::AnimationManagerBase*>(ncb);
diff --git a/src/osgPlugins/dae/daeWTransforms.cpp b/src/osgPlugins/dae/daeWTransforms.cpp
index 9c4b4d25e..9e70ca4e6 100644
--- a/src/osgPlugins/dae/daeWTransforms.cpp
+++ b/src/osgPlugins/dae/daeWTransforms.cpp
@@ -67,7 +67,7 @@ void daeWriter::apply( osg::MatrixTransform &node )
     std::string nodeName = getNodeName(node,"matrixTransform");
     currentNode->setId(nodeName.c_str());
 
-    osg::NodeCallback* ncb = node.getUpdateCallback();
+    osg::Callback* ncb = node.getUpdateCallback();
     bool handled = false;
     if (ncb)
     {
@@ -124,7 +124,7 @@ void daeWriter::apply( osg::PositionAttitudeTransform &node )
     const osg::Quat &q = node.getAttitude();
     const osg::Vec3 &s = node.getScale();
 
-    osg::NodeCallback* ncb = node.getUpdateCallback();
+    osg::Callback* ncb = node.getUpdateCallback();
     bool handled = false;
     if (ncb)
     {
@@ -287,7 +287,7 @@ void daeWriter::apply( osg::Transform &node )
             osg::Matrix matrix;
             node.computeLocalToWorldMatrix(matrix, NULL);
 
-            osg::NodeCallback* ncb = node.getUpdateCallback();
+            osg::Callback* ncb = node.getUpdateCallback();
             bool handled = false;
             if (ncb)
             {
@@ -309,7 +309,7 @@ void daeWriter::apply( osg::Transform &node )
                 domMatrix *mat = daeSafeCast< domMatrix >(currentNode->add( COLLADA_ELEMENT_MATRIX ) );
                 nodeName += "_matrix";
                 mat->setSid(nodeName.c_str());
-        
+
                 const osg::Matrix::value_type *mat_vals = matrix.ptr();
                 for ( int i = 0; i < 4; i++ )
                 {
diff --git a/src/osgPlugins/dae/daeWriter.h b/src/osgPlugins/dae/daeWriter.h
index c6cf19d18..e8e557826 100644
--- a/src/osgPlugins/dae/daeWriter.h
+++ b/src/osgPlugins/dae/daeWriter.h
@@ -93,7 +93,7 @@ public:
 
     virtual void apply(osg::Node& node)
     {
-        osg::NodeCallback* ncb = node.getUpdateCallback();
+        osg::Callback* ncb = node.getUpdateCallback();
         if (ncb)
         {
             osgAnimation::AnimationUpdateCallback<osg::NodeCallback>* ut = dynamic_cast<osgAnimation::AnimationUpdateCallback<osg::NodeCallback>*>(ncb);
diff --git a/src/osgPlugins/txp/TXPNode.h b/src/osgPlugins/txp/TXPNode.h
index d3f60a04e..43149e428 100644
--- a/src/osgPlugins/txp/TXPNode.h
+++ b/src/osgPlugins/txp/TXPNode.h
@@ -37,7 +37,6 @@
 
 #include <osg/Group>
 #include <osg/NodeVisitor>
-#include <osg/NodeCallback>
 #include <osg/ref_ptr>
 
 #include "TXPArchive.h"
diff --git a/src/osgUtil/CullVisitor.cpp b/src/osgUtil/CullVisitor.cpp
index 764509340..9afe65f4b 100644
--- a/src/osgUtil/CullVisitor.cpp
+++ b/src/osgUtil/CullVisitor.cpp
@@ -985,8 +985,11 @@ void CullVisitor::apply(osg::Drawable& drawable)
 
     if( drawable.getCullCallback() )
     {
-        if( drawable.getCullCallback()->cull( this, &drawable, &_renderInfo ) == true )
-        return;
+        osg::Drawable::CullCallback* dcb = dynamic_cast<osg::Drawable::CullCallback*>(drawable.getCullCallback());
+        if (dcb)
+        {
+            if( dcb->cull( this, &drawable, &_renderInfo ) == true ) return;
+        }
     }
 
     if (!getNodePath().empty() && getNodePath().back()->isCullingActive() && isCulled(bb)) return;
@@ -1073,7 +1076,8 @@ void CullVisitor::apply(Billboard& node)
 
         if( drawable->getCullCallback() )
         {
-            if( drawable->getCullCallback()->cull( this, drawable, &_renderInfo ) == true )
+            osg::Drawable::CullCallback* dcb = dynamic_cast<osg::Drawable::CullCallback*>(drawable->getCullCallback());
+            if (dcb && dcb->cull( this, drawable, &_renderInfo ) == true )
                 continue;
         }
 
diff --git a/src/osgUtil/SceneView.cpp b/src/osgUtil/SceneView.cpp
index c6f7688cf..06e5e9331 100644
--- a/src/osgUtil/SceneView.cpp
+++ b/src/osgUtil/SceneView.cpp
@@ -903,8 +903,8 @@ bool SceneView::cullStage(const osg::Matrixd& projection,const osg::Matrixd& mod
     // If the camera has a cullCallback execute the callback which has the
     // requirement that it must traverse the camera's children.
     {
-       osg::NodeCallback* callback = _camera->getCullCallback();
-       if (callback) (*callback)(_camera.get(), cullVisitor);
+       osg::Callback* callback = _camera->getCullCallback();
+       if (callback) callback->run(_camera.get(), cullVisitor);
        else cullVisitor->traverse(*_camera);
     }
 
diff --git a/src/osgWrappers/deprecated-dotosg/osg/NodeCallback.cpp b/src/osgWrappers/deprecated-dotosg/osg/NodeCallback.cpp
index e49dbb589..5644db54e 100644
--- a/src/osgWrappers/deprecated-dotosg/osg/NodeCallback.cpp
+++ b/src/osgWrappers/deprecated-dotosg/osg/NodeCallback.cpp
@@ -1,6 +1,6 @@
 #include <osg/Notify>
 
-#include <osg/NodeCallback>
+#include <osg/Callback>
 
 #include <osgDB/Registry>
 #include <osgDB/Input>
diff --git a/src/osgWrappers/serializers/osg/Callback.cpp b/src/osgWrappers/serializers/osg/Callback.cpp
new file mode 100644
index 000000000..5c7f71583
--- /dev/null
+++ b/src/osgWrappers/serializers/osg/Callback.cpp
@@ -0,0 +1,18 @@
+#undef OBJECT_CAST
+#define OBJECT_CAST dynamic_cast
+
+#include <osg/Node>
+#include <osgDB/ObjectWrapper>
+#include <osgDB/InputStream>
+#include <osgDB/OutputStream>
+
+REGISTER_OBJECT_WRAPPER( Callback,
+                         new osg::Callback,
+                         osg::Callback,
+                         "osg::Object osg::Callback" )
+{
+    ADD_OBJECT_SERIALIZER( NestedCallback, osg::Callback, NULL );  // _nestedCallback
+}
+
+#undef OBJECT_CAST
+#define OBJECT_CAST static_cast
diff --git a/src/osgWrappers/serializers/osg/Drawable.cpp b/src/osgWrappers/serializers/osg/Drawable.cpp
index d131a9f21..e144313f5 100644
--- a/src/osgWrappers/serializers/osg/Drawable.cpp
+++ b/src/osgWrappers/serializers/osg/Drawable.cpp
@@ -43,8 +43,8 @@ REGISTER_OBJECT_WRAPPER( Drawable,
     ADD_BOOL_SERIALIZER( SupportsDisplayList, true );  // _supportsDisplayList
     ADD_BOOL_SERIALIZER( UseDisplayList, true );  // _useDisplayList
     ADD_BOOL_SERIALIZER( UseVertexBufferObjects, false );  // _useVertexBufferObjects
-    ADD_OBJECT_SERIALIZER( UpdateCallback, osg::Drawable::UpdateCallback, NULL );  // _updateCallback
-    ADD_OBJECT_SERIALIZER( EventCallback, osg::Drawable::EventCallback, NULL );  // _eventCallback
-    ADD_OBJECT_SERIALIZER( CullCallback, osg::Drawable::CullCallback, NULL );  // _cullCallback
+    ADD_OBJECT_SERIALIZER( UpdateCallback, osg::Callback, NULL );  // _updateCallback
+    ADD_OBJECT_SERIALIZER( EventCallback, osg::Callback, NULL );  // _eventCallback
+    ADD_OBJECT_SERIALIZER( CullCallback, osg::Callback, NULL );  // _cullCallback
     ADD_OBJECT_SERIALIZER( DrawCallback, osg::Drawable::DrawCallback, NULL );  // _drawCallback
 }
diff --git a/src/osgWrappers/serializers/osg/Node.cpp b/src/osgWrappers/serializers/osg/Node.cpp
index 4fa744061..9fe5e3ff8 100644
--- a/src/osgWrappers/serializers/osg/Node.cpp
+++ b/src/osgWrappers/serializers/osg/Node.cpp
@@ -72,9 +72,9 @@ REGISTER_OBJECT_WRAPPER( Node,
     ADD_USER_SERIALIZER( InitialBound );  // _initialBound
     ADD_OBJECT_SERIALIZER( ComputeBoundingSphereCallback,
                            osg::Node::ComputeBoundingSphereCallback, NULL );  // _computeBoundCallback
-    ADD_OBJECT_SERIALIZER( UpdateCallback, osg::NodeCallback, NULL );  // _updateCallback
-    ADD_OBJECT_SERIALIZER( EventCallback, osg::NodeCallback, NULL );  // _eventCallback
-    ADD_OBJECT_SERIALIZER( CullCallback, osg::NodeCallback, NULL );  // _cullCallback
+    ADD_OBJECT_SERIALIZER( UpdateCallback, osg::Callback, NULL );  // _updateCallback
+    ADD_OBJECT_SERIALIZER( EventCallback, osg::Callback, NULL );  // _eventCallback
+    ADD_OBJECT_SERIALIZER( CullCallback, osg::Callback, NULL );  // _cullCallback
     ADD_BOOL_SERIALIZER( CullingActive, true );  // _cullingActive
     ADD_HEXINT_SERIALIZER( NodeMask, 0xffffffff );  // _nodeMask
 
diff --git a/src/osgWrappers/serializers/osg/NodeCallback.cpp b/src/osgWrappers/serializers/osg/NodeCallback.cpp
index 0b7806a9d..5590cb800 100644
--- a/src/osgWrappers/serializers/osg/NodeCallback.cpp
+++ b/src/osgWrappers/serializers/osg/NodeCallback.cpp
@@ -1,6 +1,3 @@
-#undef OBJECT_CAST
-#define OBJECT_CAST dynamic_cast
-
 #include <osg/Node>
 #include <osgDB/ObjectWrapper>
 #include <osgDB/InputStream>
@@ -9,10 +6,6 @@
 REGISTER_OBJECT_WRAPPER( NodeCallback,
                          new osg::NodeCallback,
                          osg::NodeCallback,
-                         "osg::Object osg::NodeCallback" )
+                         "osg::Object osg::Callback osg::NodeCallback" )
 {
-    ADD_OBJECT_SERIALIZER( NestedCallback, osg::NodeCallback, NULL );  // _nestedCallback
 }
-
-#undef OBJECT_CAST
-#define OBJECT_CAST static_cast