I see the broken graphic on two computers, in four different browsers. But only after I log in -- it looks fine before -- so I chased it down to the "Default Style" skin. The logo does appear in "BP-White". So, assuming "Default Style" is not in fact the default, most users won't get the broken graphic.
I think Rex, or somebody, has made several changes to that skin since my post yesterday. The logo is no longer lurking behind the menu bars, and other things look different too. (Looks nice, very readable.)