diff --git a/IPython/html/static/base/js/utils.js b/IPython/html/static/base/js/utils.js
index 5ea6705..7e8d4be 100644
--- a/IPython/html/static/base/js/utils.js
+++ b/IPython/html/static/base/js/utils.js
@@ -5,7 +5,8 @@ define([
     'base/js/namespace',
     'jquery',
     'codemirror/lib/codemirror',
-], function(IPython, $, CodeMirror){
+    'components/rsvp/rsvp.min',
+], function(IPython, $, CodeMirror, rsvp){
     "use strict";
     
     IPython.load_extensions = function () {
@@ -606,13 +607,41 @@ define([
         });
     };
 
+    var WrappedError = function(message, error){
+        // Wrappable Error class
+
+        // The Error class doesn't actually act on `this`.  Instead it always
+        // returns a new instance of Error.  Here we capture that instance so we
+        // can apply it's properties to `this`.
+        var tmp = Error.apply(this, [message]);
+
+        // Copy the properties of the error over to this.
+        var properties = Object.getOwnPropertyNames(tmp);
+        for (var i = 0; i < properties.length; i++) {
+            this[properties[i]] = tmp[properties[i]];
+        }
+
+        // Keep a stack of the original error messages.
+        if (error instanceof WrappedError) {
+            this.error_stack = error.error_stack;
+        } else {
+            this.error_stack = [error];
+        }
+        this.error_stack.push(tmp);
+
+        return this;
+    };
+
+    WrappedError.prototype = Object.create(Error.prototype, {});
+
+
     var load_class = function(class_name, module_name, registry) {
         // Tries to load a class
         //
         // Tries to load a class from a module using require.js, if a module 
         // is specified, otherwise tries to load a class from the global 
         // registry, if the global registry is provided.
-        return new Promise(function(resolve, reject) {
+        return new rsvp.Promise(function(resolve, reject) {
 
             // Try loading the view module using require.js
             if (module_name) {
@@ -638,13 +667,13 @@ define([
 
     var resolve_dict = function(d) {
         // Resolve a promiseful dictionary.
-        // Returns a single Promise.
+        // Returns a single rsvp.Promise.
         var keys = Object.keys(d);
         var values = [];
         keys.forEach(function(key) {
             values.push(d[key]);
         });
-        return Promise.all(values).then(function(v) {
+        return rsvp.Promise.all(values).then(function(v) {
             d = {};
             for(var i=0; i<keys.length; i++) {
                 d[keys[i]] = v[i];
@@ -681,15 +710,15 @@ define([
     WrappedError.prototype = Object.create(Error.prototype, {});
 
     var reject = function(message, log) {
-        // Creates a wrappable Promise rejection function.
+        // Creates a wrappable rsvp.Promise rejection function.
         // 
-        // Creates a function that returns a Promise.reject with a new WrappedError
+        // Creates a function that returns a rsvp.Promise.reject with a new WrappedError
         // that has the provided message and wraps the original error that 
         // caused the promise to reject.
         return function(error) { 
             var wrapped_error = new WrappedError(message, error);
             if (log) console.error(wrapped_error); 
-            return Promise.reject(wrapped_error); 
+            return rsvp.Promise.reject(wrapped_error); 
         };
     };
 
@@ -722,9 +751,9 @@ define([
         XHR_ERROR : XHR_ERROR,
         wrap_ajax_error : wrap_ajax_error,
         promising_ajax : promising_ajax,
+        WrappedError: WrappedError,
         load_class: load_class,
         resolve_dict: resolve_dict,
-        WrappedError: WrappedError,
         reject: reject,
     };
 
diff --git a/IPython/html/static/services/kernels/comm.js b/IPython/html/static/services/kernels/comm.js
index 0c99ad2..c9a0635 100644
--- a/IPython/html/static/services/kernels/comm.js
+++ b/IPython/html/static/services/kernels/comm.js
@@ -5,7 +5,8 @@ define([
     'base/js/namespace',
     'jquery',
     'base/js/utils',
-], function(IPython, $, utils) {
+    'components/rsvp/rsvp.min',
+], function(IPython, $, utils, rsvp) {
     "use strict";
 
     //-----------------------------------------------------------------------
@@ -78,7 +79,7 @@ define([
                 comm.close();
                 that.unregister_comm(comm);
                 var error = new utils.WrappedError("Exception opening new comm", e);
-                return Promise.reject(error);
+                return rsvp.Promise.reject(error);
             }
             return comm;
         }, utils.reject('Could not open comm', true));
diff --git a/IPython/html/static/widgets/js/manager.js b/IPython/html/static/widgets/js/manager.js
index c3c5cce..cf0e94b 100644
--- a/IPython/html/static/widgets/js/manager.js
+++ b/IPython/html/static/widgets/js/manager.js
@@ -6,8 +6,9 @@ define([
     "backbone",
     "jquery",
     "base/js/utils",
-    "base/js/namespace"
-], function (_, Backbone, $, utils, IPython) {
+    "base/js/namespace",
+    'components/rsvp/rsvp.min',
+], function (_, Backbone, $, utils, IPython, rsvp) {
     "use strict";
     //--------------------------------------------------------------------
     // WidgetManager class
@@ -48,7 +49,7 @@ define([
     //--------------------------------------------------------------------
     WidgetManager.prototype.display_view = function(msg, model) {
         // Displays a view for a particular model.
-        return new Promise(function(resolve, reject) {
+        return new rsvp.Promise(function(resolve, reject) {
             var cell = this.get_msg_cell(msg.parent_header.msg_id);
             if (cell === null) {
                 reject(new Error("Could not determine where the display" + 
@@ -230,7 +231,7 @@ define([
             }, function(error) {
                 delete that._models[model_id];
                 var wrapped_error = new utils.WrappedError("Couldn't create model", error);
-                return Promise.reject(wrapped_error);
+                return rsvp.Promise.reject(wrapped_error);
             });
         this._models[model_id] = model_promise;
         return model_promise;
diff --git a/IPython/html/static/widgets/js/widget.js b/IPython/html/static/widgets/js/widget.js
index 55412bb..b45d434 100644
--- a/IPython/html/static/widgets/js/widget.js
+++ b/IPython/html/static/widgets/js/widget.js
@@ -7,7 +7,8 @@ define(["widgets/js/manager",
         "jquery",
         "base/js/utils",
         "base/js/namespace",
-], function(widgetmanager, _, Backbone, $, utils, IPython){
+        "components/rsvp/rsvp.min",
+], function(widgetmanager, _, Backbone, $, utils, IPython, rsvp){
 
     var WidgetModel = Backbone.Model.extend({
         constructor: function (widget_manager, model_id, comm) {
@@ -22,7 +23,7 @@ define(["widgets/js/manager",
             //      An ID unique to this model.
             // comm : Comm instance (optional)
             this.widget_manager = widget_manager;
-            this.state_change = Promise.resolve();
+            this.state_change = rsvp.Promise.resolve();
             this._buffered_state_diff = {};
             this.pending_msgs = 0;
             this.msg_buffer = null;
@@ -257,7 +258,7 @@ define(["widgets/js/manager",
                 _.each(value, function(sub_value, key) {
                     unpacked.push(that._unpack_models(sub_value));
                 });
-                return Promise.all(unpacked);
+                return rsvp.Promise.all(unpacked);
             } else if (value instanceof Object) {
                 unpacked = {};
                 _.each(value, function(sub_value, key) {
@@ -268,7 +269,7 @@ define(["widgets/js/manager",
                 // get_model returns a promise already
                 return this.widget_manager.get_model(value.slice(10, value.length));
             } else {
-                return Promise.resolve(value);
+                return rsvp.Promise.resolve(value);
             }
         },