http://bugs.winehq.org/show_bug.cgi?id=10883
--- Comment #3 from H. Verbeet hverbeet@gmail.com 2007-12-25 20:50:51 --- It looks like that patch makes backbuffer -> offscreen surface blits fallback to software. I'm not sure if that was intentional, but considering that case is explicitly handled a couple of lines below I'd guess not.