It seems that facebook doesn't like to be launched in frame any more. If you hold the link it will launch in new window and that is fine. you can also bookmark it and launch from your bookmarks. I will be removing the link since I cannot do anything about 3rd party website.
Same thing happens to me to. It has to do with the frame the page is rendered in, (opening mobile facebook on a PSP portal in firefox has the same results). I've just clicking anywhere in the black brings back the home page. Hope this helps you.