http://bugs.winehq.org/show_bug.cgi?id=16997
--- Comment #44 from Stefan Dösinger stefandoesinger@gmx.at 2009-02-23 17:34:21 --- Can you try this patch? : http://www.winehq.org/pipermail/wine-patches/2009-February/069822.html
I don't know if it will help, but I think it was a problem introduced with one of the fog patches. I had it in my tree for quite a while, and that would explain why I didn't see any problematic differences between the old and the new code.