favicon not showing

upgraded to 3.4.6 and it seem now my favicon isn't showing properly. it's just a generic firefox blank page with a corner folded. when i switch to other icons, including the default, it works (shows up in my browser tabs and address bar). strangely, when i go to the file directly, it will "work": http://www.chinabeergeek.com/wp-cont...on/favicon.ico