From Farshid Lashkari, "There was a bug in ParticleSystem where the bounds is not properly

flagged as computed when there is only 1 particle. Attached is the
fix."

include/osgParticle/ParticleSystem

@@ -314,11 +314,10 @@ namespace osgParticle
             if (p.x() + r > _bmax.x()) _bmax.x() = p.x() + r;
             if (p.y() + r > _bmax.y()) _bmax.y() = p.y() + r;
             if (p.z() + r > _bmax.z()) _bmax.z() = p.z() + r;
-            
+        }
         if (!_bounds_computed) 
             _bounds_computed = true;
     }
-    }
 
     inline Particle& ParticleSystem::getDefaultParticleTemplate()
     {