http://bugs.winehq.org/show_bug.cgi?id=23589
--- Comment #6 from Henri Verbeet hverbeet@gmail.com 2010-07-22 18:01:18 --- (In reply to comment #5)
The GLSL Shader errors are what's causing this bug. Turning off GLSL via winetricks stops the bug.
You can't draw that conclusion, and in fact I think it's unlikely. Since you're using GF7, does the patch at http://bugs2.winehq.org/attachment.cgi?id=29390 make any difference? Also, is this a regression? (If you're not sure, give something like wine-1.1.27 a try.)