diff --git a/IPython/html/static/notebook/js/codecell.js b/IPython/html/static/notebook/js/codecell.js
index d168333..53b010c 100644
--- a/IPython/html/static/notebook/js/codecell.js
+++ b/IPython/html/static/notebook/js/codecell.js
@@ -240,7 +240,7 @@ var IPython = (function (IPython) {
      * @method execute
      */
     CodeCell.prototype.execute = function () {
-        this.output_area.clear_output(true, true, true);
+        this.output_area.clear_output();
         this.set_input_prompt('*');
         this.element.addClass("running");
         var callbacks = {
@@ -250,7 +250,7 @@ var IPython = (function (IPython) {
             'set_next_input': $.proxy(this._handle_set_next_input, this),
             'input_request': $.proxy(this._handle_input_request, this)
         };
-        var msg_id = this.session.kernel.execute(this.get_text(), callbacks, {silent: false, store_history: true});
+        this.last_msg_id = this.session.kernel.execute(this.get_text(), callbacks, {silent: false, store_history: true});
     };
 
     /**
@@ -386,8 +386,8 @@ var IPython = (function (IPython) {
     };
 
 
-    CodeCell.prototype.clear_output = function (stdout, stderr, other) {
-        this.output_area.clear_output(stdout, stderr, other);
+    CodeCell.prototype.clear_output = function (wait) {
+        this.output_area.clear_output(wait);
     };
 
 
diff --git a/IPython/html/static/notebook/js/notebook.js b/IPython/html/static/notebook/js/notebook.js
index c7d1922..ef8fb28 100644
--- a/IPython/html/static/notebook/js/notebook.js
+++ b/IPython/html/static/notebook/js/notebook.js
@@ -756,7 +756,7 @@ var IPython = (function (IPython) {
         var i = this.index_or_selected(index);
         var cell = this.get_selected_cell();
         this.undelete_backup = cell.toJSON();
-        $('#undelete_cell').removeClass('ui-state-disabled');
+        $('#undelete_cell').removeClass('disabled');
         if (this.is_valid_cell_index(i)) {
             var ce = this.get_cell_element(i);
             ce.remove();
@@ -1039,11 +1039,11 @@ var IPython = (function (IPython) {
     Notebook.prototype.enable_paste = function () {
         var that = this;
         if (!this.paste_enabled) {
-            $('#paste_cell_replace').removeClass('ui-state-disabled')
+            $('#paste_cell_replace').removeClass('disabled')
                 .on('click', function () {that.paste_cell_replace();});
-            $('#paste_cell_above').removeClass('ui-state-disabled')
+            $('#paste_cell_above').removeClass('disabled')
                 .on('click', function () {that.paste_cell_above();});
-            $('#paste_cell_below').removeClass('ui-state-disabled')
+            $('#paste_cell_below').removeClass('disabled')
                 .on('click', function () {that.paste_cell_below();});
             this.paste_enabled = true;
         };
@@ -1056,9 +1056,9 @@ var IPython = (function (IPython) {
      */
     Notebook.prototype.disable_paste = function () {
         if (this.paste_enabled) {
-            $('#paste_cell_replace').addClass('ui-state-disabled').off('click');
-            $('#paste_cell_above').addClass('ui-state-disabled').off('click');
-            $('#paste_cell_below').addClass('ui-state-disabled').off('click');
+            $('#paste_cell_replace').addClass('disabled').off('click');
+            $('#paste_cell_above').addClass('disabled').off('click');
+            $('#paste_cell_below').addClass('disabled').off('click');
             this.paste_enabled = false;
         };
     };
@@ -1157,7 +1157,7 @@ var IPython = (function (IPython) {
             this.undelete_backup = null;
             this.undelete_index = null;
         }
-        $('#undelete_cell').addClass('ui-state-disabled');
+        $('#undelete_cell').addClass('disabled');
     }
 
     // Split/merge
@@ -1360,7 +1360,7 @@ var IPython = (function (IPython) {
         var cells = this.get_cells();
         for (var i=0; i<ncells; i++) {
             if (cells[i] instanceof IPython.CodeCell) {
-                cells[i].clear_output(true,true,true);
+                cells[i].clear_output();
                 // Make all In[] prompts blank, as well
                 // TODO: make this configurable (via checkbox?)
                 cells[i].set_input_prompt();
@@ -1873,7 +1873,7 @@ var IPython = (function (IPython) {
      * Request a notebook's data from the server.
      * 
      * @method load_notebook
-     * @param {String} notebook_naem and path A notebook to load
+     * @param {String} notebook_name and path A notebook to load
      */
     Notebook.prototype.load_notebook = function (notebook_name, notebook_path) {
         var that = this;
@@ -1896,7 +1896,7 @@ var IPython = (function (IPython) {
             this.notebook_name
         );
         $.ajax(url, settings);
-     };
+    };
 
     /**
      * Success callback for loading a notebook from the server.
diff --git a/IPython/html/static/services/kernels/js/kernel.js b/IPython/html/static/services/kernels/js/kernel.js
index 82d5f45..ac9db71 100644
--- a/IPython/html/static/services/kernels/js/kernel.js
+++ b/IPython/html/static/services/kernels/js/kernel.js
@@ -31,7 +31,7 @@ var IPython = (function (IPython) {
         this.stdin_channel = null;
         this.base_url = base_url;
         this.running = false;
-        this.username= "username";
+        this.username = "username";
         this.session_id = utils.uuid();
         this._msg_callbacks = {};
 
diff --git a/IPython/html/templates/notebook.html b/IPython/html/templates/notebook.html
index ddf0dfe..0abb374 100644
--- a/IPython/html/templates/notebook.html
+++ b/IPython/html/templates/notebook.html
@@ -86,11 +86,11 @@ class="notebook_app"
             <ul class="dropdown-menu">
                 <li id="cut_cell"><a href="#">Cut Cell</a></li>
                 <li id="copy_cell"><a href="#">Copy Cell</a></li>
-                <li id="paste_cell_above" class="ui-state-disabled"><a href="#">Paste Cell Above</a></li>
-                <li id="paste_cell_below" class="ui-state-disabled"><a href="#">Paste Cell Below</a></li>
-                <li id="paste_cell_replace" class="ui-state-disabled"><a href="#">Paste Cell &amp; Replace</a></li>
+                <li id="paste_cell_above" class="disabled"><a href="#">Paste Cell Above</a></li>
+                <li id="paste_cell_below" class="disabled"><a href="#">Paste Cell Below</a></li>
+                <li id="paste_cell_replace" class="disabled"><a href="#">Paste Cell &amp; Replace</a></li>
                 <li id="delete_cell"><a href="#">Delete Cell</a></li>
-                <li id="undelete_cell" class="ui-state-disabled"><a href="#">Undo Delete Cell</a></li>
+                <li id="undelete_cell" class="disabled"><a href="#">Undo Delete Cell</a></li>
                 <li class="divider"></li>
                 <li id="split_cell"><a href="#">Split Cell</a></li>
                 <li id="merge_cell_above"><a href="#">Merge Cell Above</a></li>