         var appDescriptor:XML = NativeApplication.nativeApplication.applicationDescriptor;
         var ns:Namespace = appDescriptor.namespace();
         
-        // TODO (chiedozi): See if reserving these keys is bad
-        persistenceManager.setProperty("timestamp", new Date().getTime());
         persistenceManager.setProperty("applicationVersion", 
                                         appDescriptor.ns::versionNumber.toString());
     }

        // The backKeyEventPreventDefaulted key is always set in the
        // deviceKeyDownHandler method and so doesn't need to be reset.
        if (key == Keyboard.BACK && !backKeyEventPreventDefaulted && !exitApplicationOnBackKey)
            backKeyHandler();
        else if (key == Keyboard.MENU && !menuKeyEventPreventDefaulted)
            menuKeyHandler(event);
    }

     *  @playerversion AIR 2.5
     *  @productversion Flex 4.5
     */ 
    protected function backKeyHandler(event:KeyboardEvent):void
    {
        
    }
