diff --git a/src/Angular.js b/src/Angular.js
index 952e7a1d41a9..d3b299ddad32 100644
--- a/src/Angular.js
+++ b/src/Angular.js
@@ -58,7 +58,7 @@ var /** holds major version number for IE or NaN for real browsers */
 
     _angular          = window.angular,
     /** @name angular */
-    angular           = window.angular || (window.angular = {}),
+    angular           = window.angular = {},
     angularModule,
     nodeName_,
     uid               = ['0', '0', '0'];
diff --git a/src/ng/httpBackend.js b/src/ng/httpBackend.js
index 5b9657057e66..31b66f17e366 100644
--- a/src/ng/httpBackend.js
+++ b/src/ng/httpBackend.js
@@ -25,12 +25,12 @@ var XHR = window.XMLHttpRequest || function() {
  */
 function $HttpBackendProvider() {
   this.$get = ['$browser', '$window', '$document', function($browser, $window, $document) {
-    return createHttpBackend($browser, XHR, $browser.defer, $window.angular.callbacks,
+    return createHttpBackend($browser, $window, XHR, $browser.defer,
         $document[0], $window.location.protocol.replace(':', ''));
   }];
 }
 
-function createHttpBackend($browser, XHR, $browserDefer, callbacks, rawDocument, locationProtocol) {
+function createHttpBackend($browser, $window, XHR, $browserDefer, rawDocument, locationProtocol) {
   // TODO(vojta): fix the signature
   return function(method, url, post, callback, headers, timeout, withCredentials, responseType) {
     var status;
@@ -38,19 +38,19 @@ function createHttpBackend($browser, XHR, $browserDefer, callbacks, rawDocument,
     url = url || $browser.url();
 
     if (lowercase(method) == 'jsonp') {
-      var callbackId = '_' + (callbacks.counter++).toString(36);
-      callbacks[callbackId] = function(data) {
-        callbacks[callbackId].data = data;
+      var callbackHanger = 'ngJsonpCallback_' + Math.random().toString(36).substring(7);
+      $window[callbackHanger] = function(data) {
+        $window[callbackHanger].data = data;
       };
 
-      var jsonpDone = jsonpReq(url.replace('JSON_CALLBACK', 'angular.callbacks.' + callbackId),
+      var jsonpDone = jsonpReq(url.replace('JSON_CALLBACK', callbackHanger),
           function() {
-        if (callbacks[callbackId].data) {
-          completeRequest(callback, 200, callbacks[callbackId].data);
+        if ($window[callbackHanger].data) {
+          completeRequest(callback, 200, $window[callbackHanger].data);
         } else {
           completeRequest(callback, status || -2);
         }
-        delete callbacks[callbackId];
+        delete $window[callbackHanger];
       });
     } else {
       var xhr = new XHR();
diff --git a/test/ng/httpBackendSpec.js b/test/ng/httpBackendSpec.js
index c65ab2e17c5b..e26075d90e75 100644
--- a/test/ng/httpBackendSpec.js
+++ b/test/ng/httpBackendSpec.js
@@ -1,6 +1,6 @@
 describe('$httpBackend', function() {
 
-  var $backend, $browser, callbacks,
+  var $backend, $browser, $window, callbacks,
       xhr, fakeDocument, callback,
       fakeTimeoutId = 0;
 
@@ -36,6 +36,7 @@ describe('$httpBackend', function() {
   beforeEach(inject(function($injector) {
     callbacks = {counter: 0};
     $browser = $injector.get('$browser');
+    $window = $injector.get('$window');
     fakeDocument = {
       $$scripts: [],
       createElement: jasmine.createSpy('createElement').andCallFake(function() {
@@ -53,7 +54,7 @@ describe('$httpBackend', function() {
         })
       }
     };
-    $backend = createHttpBackend($browser, MockXhr, fakeTimeout, callbacks, fakeDocument);
+    $backend = createHttpBackend($browser, $window, MockXhr, fakeTimeout, fakeDocument);
     callback = jasmine.createSpy('done');
   }));
 
@@ -200,7 +201,7 @@ describe('$httpBackend', function() {
       expect(response).toBe('response');
     });
 
-    $backend = createHttpBackend($browser, SyncXhr);
+    $backend = createHttpBackend($browser, $window, SyncXhr);
     $backend('GET', '/url', null, callback);
     expect(callback).toHaveBeenCalledOnce();
   });
@@ -232,7 +233,7 @@ describe('$httpBackend', function() {
 
   describe('JSONP', function() {
 
-    var SCRIPT_URL = /([^\?]*)\?cb=angular\.callbacks\.(.*)/;
+    var SCRIPT_URL = /([^\?]*)\?cb=ngJsonpCallback_(.*)/;
 
 
     it('should add script tag for JSONP request', function() {
@@ -243,12 +244,12 @@ describe('$httpBackend', function() {
 
       $backend('JSONP', 'http://example.org/path?cb=JSON_CALLBACK', null, callback);
       expect(fakeDocument.$$scripts.length).toBe(1);
-
       var script = fakeDocument.$$scripts.shift(),
           url = script.src.match(SCRIPT_URL);
 
       expect(url[1]).toBe('http://example.org/path');
-      callbacks[url[2]]('some-data');
+      var callbackHanger = 'ngJsonpCallback_' + url[2];
+      $window[callbackHanger]('some-data');
 
       if (script.onreadystatechange) {
         script.readyState = 'complete';
@@ -267,9 +268,9 @@ describe('$httpBackend', function() {
 
 
       var script = fakeDocument.$$scripts.shift(),
-          callbackId = script.src.match(SCRIPT_URL)[2];
+          callbackHanger = 'ngJsonpCallback_' + script.src.match(SCRIPT_URL)[2];
 
-      callbacks[callbackId]('some-data');
+      $window[callbackHanger]('some-data');
 
       if (script.onreadystatechange) {
         script.readyState = 'complete';
@@ -278,7 +279,7 @@ describe('$httpBackend', function() {
         script.onload()
       }
 
-      expect(callbacks[callbackId]).toBeUndefined();
+      expect($window[callbackHanger]).toBeUndefined();
       expect(fakeDocument.body.removeChild).toHaveBeenCalledOnceWith(script);
     });
 
@@ -344,7 +345,7 @@ describe('$httpBackend', function() {
 
 
     it('should convert 0 to 200 if content', function() {
-      $backend = createHttpBackend($browser, MockXhr, null, null, null, 'http');
+      $backend = createHttpBackend($browser, $window, MockXhr, null, null, 'http');
 
       $backend('GET', 'file:///whatever/index.html', null, callback);
       respond(0, 'SOME CONTENT');
@@ -355,7 +356,7 @@ describe('$httpBackend', function() {
 
 
     it('should convert 0 to 200 if content - relative url', function() {
-      $backend = createHttpBackend($browser, MockXhr, null, null, null, 'file');
+      $backend = createHttpBackend($browser, $window, MockXhr, null, null, 'file');
 
       $backend('GET', '/whatever/index.html', null, callback);
       respond(0, 'SOME CONTENT');
@@ -366,7 +367,7 @@ describe('$httpBackend', function() {
 
 
     it('should convert 0 to 404 if no content', function() {
-      $backend = createHttpBackend($browser, MockXhr, null, null, null, 'http');
+      $backend = createHttpBackend($browser, $window, MockXhr, null, null, 'http');
 
       $backend('GET', 'file:///whatever/index.html', null, callback);
       respond(0, '');
@@ -377,7 +378,7 @@ describe('$httpBackend', function() {
 
 
     it('should convert 0 to 200 if content - relative url', function() {
-      $backend = createHttpBackend($browser, MockXhr, null, null, null, 'file');
+      $backend = createHttpBackend($browser, $window, MockXhr, null, null, 'file');
 
       $backend('GET', '/whatever/index.html', null, callback);
       respond(0, '');