http://bugs.winehq.org/show_bug.cgi?id=18232
--- Comment #19 from Starks erappleman@gmail.com 2009-11-20 11:37:43 --- Kernel: 2.6.32-rc7 Wine: 1.1.33 Xorg: 1.7.99 Mesa: 7.8 Intel: 2.9.0
Not sure who I should thank, but using bleeding-edge drivers, a newer version of wine, and "backbuffer" for OffscreenRenderingMode seems to have fixed this bug for me.