diff --git a/lib/cartodb/controllers/base.js b/lib/cartodb/controllers/base.js
index 3c968711..d3b84513 100644
--- a/lib/cartodb/controllers/base.js
+++ b/lib/cartodb/controllers/base.js
@@ -10,12 +10,15 @@ var lzmaWorker = new LZMA();
 // Whitelist query parameters and attach format
 var REQUEST_QUERY_PARAMS_WHITELIST = [
     'config',
-    'filters',
-    'bbox',
     'map_key',
     'api_key',
     'auth_token',
-    'callback'
+    'callback',
+    // widgets & filters
+    'filters',
+    'bbox',
+    'start',
+    'end'
 ];
 
 function BaseController(authApi, pgConnection) {
@@ -193,7 +196,7 @@ BaseController.prototype.sendError = function(req, res, err, label) {
 
     var statusCode = findStatusCode(err);
 
-    debug('[%s ERROR] -- %d: %s', label, statusCode, err);
+    debug('[%s ERROR] -- %d: %s, %s', label, statusCode, err, err.stack);
 
     // If a callback was requested, force status to 200
     if (req.query && req.query.callback) {
diff --git a/test/acceptance/widgets.js b/test/acceptance/widgets.js
index 1fe3ae20..29ad1137 100644
--- a/test/acceptance/widgets.js
+++ b/test/acceptance/widgets.js
@@ -148,7 +148,7 @@ describe('widgets', function() {
                 {name:"El Lacón"},
                 {name:"El Pico"}
             ];
-            assert.deepEqual(JSON.parse(res.body).rows, expectedList);
+            assert.deepEqual(JSON.parse(res.body).ownFilterOn.rows, expectedList);
 
             done();
         });
@@ -182,7 +182,7 @@ describe('widgets', function() {
             }
 
             var histogram = JSON.parse(res.body);
-            assert.ok(histogram.bins.length);
+            assert.ok(histogram.ownFilterOn.bins.length);
 
             done();
         });
@@ -221,8 +221,8 @@ describe('widgets', function() {
                     }
 
                     var aggregation = JSON.parse(res.body);
-                    assert.equal(aggregation.categories.length, 223);
-                    assert.deepEqual(aggregation.categories[0], { count: 769, adm0_a3: 'USA' });
+                    assert.equal(aggregation.ownFilterOn.categories.length, 223);
+                    assert.deepEqual(aggregation.ownFilterOn.categories[0], { count: 769, adm0_a3: 'USA' });
 
                     done();
                 });
@@ -242,8 +242,8 @@ describe('widgets', function() {
                     }
 
                     var aggregation = JSON.parse(res.body);
-                    assert.equal(aggregation.categories.length, 1);
-                    assert.deepEqual(aggregation.categories[0], { count: 256, adm0_a3: 'CAN' });
+                    assert.equal(aggregation.ownFilterOn.categories.length, 1);
+                    assert.deepEqual(aggregation.ownFilterOn.categories[0], { count: 256, adm0_a3: 'CAN' });
 
                     done();
                 });
@@ -281,7 +281,10 @@ describe('widgets', function() {
 
                     var histogram = JSON.parse(res.body);
                     // notice min value
-                    assert.deepEqual(histogram.bins[0], { bin: 0, min: 0, max: 3917000, freq: 7229 });
+                    assert.deepEqual(
+                        histogram.ownFilterOn.bins[0],
+                        { bin:0, start:0, end:3567600, freq:7229, min:0, max:3917000 }
+                    );
 
                     done();
                 });
@@ -304,7 +307,14 @@ describe('widgets', function() {
 
                     var histogram = JSON.parse(res.body);
                     // notice min value
-                    assert.deepEqual(histogram.bins[0], { bin: 0, min: 4009000, max: 7297054, freq: 50 });
+                    assert.deepEqual(histogram.ownFilterOn.bins[0], {
+                        bin: 0,
+                        start: 4009000,
+                        end: 7175700,
+                        freq: 50,
+                        min: 4009000,
+                        max: 7297054
+                    });
 
                     done();
                 });
@@ -359,10 +369,10 @@ describe('widgets', function() {
                     var aggregation = JSON.parse(res.body);
 
                     // first one would be CHN if reject filter wasn't applied
-                    assert.deepEqual(aggregation.categories[0], {"count":769,"adm0_a3":"USA"});
+                    assert.deepEqual(aggregation.ownFilterOn.categories[0], {"count":769,"adm0_a3":"USA"});
 
                     // confirm 'CHN' was filtered out (reject)
-                    assert.equal(aggregation.categories.reduce(function(sum, row) {
+                    assert.equal(aggregation.ownFilterOn.categories.reduce(function(sum, row) {
                         return sum + (row.adm0_a3 === 'CHN' ? 1 : 0);
                     }, 0), 0);
 
@@ -389,10 +399,10 @@ describe('widgets', function() {
                     var aggregation = JSON.parse(res.body);
 
                     // first one would be CHN if reject filter wasn't applied
-                    assert.deepEqual(aggregation.categories[0], { count: 4, adm0_a3: 'IND' });
+                    assert.deepEqual(aggregation.ownFilterOn.categories[0], { count: 4, adm0_a3: 'IND' });
 
                     // confirm 'CHN' was filtered out (reject)
-                    assert.equal(aggregation.categories.reduce(function(sum, row) {
+                    assert.equal(aggregation.ownFilterOn.categories.reduce(function(sum, row) {
                         return sum + (row.adm0_a3 === 'CHN' ? 1 : 0);
                     }, 0), 0);
 
@@ -419,10 +429,10 @@ describe('widgets', function() {
                     var aggregation = JSON.parse(res.body);
 
                     // first one would be CHN if reject filter wasn't applied
-                    assert.deepEqual(aggregation.categories[0], {"count":96,"adm0_a3":"RUS"});
+                    assert.deepEqual(aggregation.ownFilterOn.categories[0], {"count":96,"adm0_a3":"RUS"});
 
                     // confirm 'CHN' was filtered out (reject)
-                    assert.equal(aggregation.categories.reduce(function(sum, row) {
+                    assert.equal(aggregation.ownFilterOn.categories.reduce(function(sum, row) {
                         return sum + (row.adm0_a3 === 'CHN' ? 1 : 0);
                     }, 0), 0);
 
@@ -450,10 +460,10 @@ describe('widgets', function() {
                     var aggregation = JSON.parse(res.body);
 
                     // first one would be CHN if reject filter wasn't applied
-                    assert.deepEqual(aggregation.categories[0], {"count":77,"adm0_a3":"TUR"});
+                    assert.deepEqual(aggregation.ownFilterOn.categories[0], {"count":77,"adm0_a3":"TUR"});
 
                     // confirm 'CHN' was filtered out (reject)
-                    assert.equal(aggregation.categories.reduce(function(sum, row) {
+                    assert.equal(aggregation.ownFilterOn.categories.reduce(function(sum, row) {
                         return sum + (row.adm0_a3 === 'CHN' ? 1 : 0);
                     }, 0), 0);