http://bugs.winehq.org/show_bug.cgi?id=10973
--- Comment #3 from Alexander Dorofeyev alexd4@inbox.lv 2007-12-31 17:57:08 --- I see in the logs that the app is setting shaders, and it uses P8 textures. Perhaps that's the problem, that its shaders are unhappy with the "behind the stage" magic Wine does with P8 textures?
BTW it's not like it was perfect before. I tried wine-0.9.50 and there are visible artifacts there as well + cursor has a Black rectangle. But it certainly got a lot worse in 0.9.52.