add:  if (!client.initialized) return null;  
context: function c_updatemenus(menus){    return this.menuManager.updateMenus(document, menus);}
meta: 1567	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1567/1c1a6e27feb94deb31a895afa254290ee6aa64a6/static.js/buggy/xul/content/static.js