Update document title and last_saved_name only after a successful save.

IPython/frontend/html/notebook/static/js/notebook.js

@@ -881,6 +881,7 b' var IPython = (function (IPython) {'
 
     Notebook.prototype.notebook_saved = function (data, status, xhr) {
         this.dirty = false;
+        IPython.save_widget.notebook_saved();
         setTimeout($.proxy(IPython.save_widget.status_save,IPython.save_widget),500);
     }
 

IPython/frontend/html/notebook/static/js/savewidget.js

@@ -49,6 +49,10 b' var IPython = (function (IPython) {'
 
     SaveWidget.prototype.save_notebook = function () {
         IPython.notebook.save_notebook();
+    };
+
+
+    SaveWidget.prototype.notebook_saved = function () {
         this.set_document_title();
         this.last_saved_name = this.get_notebook_name();
     };