[URL=http://img295.imageshack.us/i/screenshot1ch.jpg/][IMG]http://img295.imageshack.us/img295/2059/screenshot1ch.th.jpg[/img][/URL]
This is new in 0.3.1, as I've never seen it in 0.3. It doesn't happen that often, and only in the starting menu. Occurs in both windowed and full-screen. I got it at a higher resolution, too, but it was a single garbled square over the 'A' in "Advanced".
Linux Mint 9 (Isadora) 32-bit