http://bugs.winehq.org/show_bug.cgi?id=29728
--- Comment #3 from Henri Verbeet hverbeet@gmail.com 2012-01-28 12:00:27 CST --- (In reply to comment #2)
Video driver bug. Please report to Xorg.
In particular, that's https://bugs.freedesktop.org/show_bug.cgi?id=41791. Use DRAW_USE_LLVM=0 as a workaround.