http://bugs.winehq.org/show_bug.cgi?id=28112
--- Comment #9 from Henri Verbeet hverbeet@gmail.com 2011-09-11 14:40:43 CDT --- I suspect it may be due to us not doing real buffer flips with the GL renderer. (I.e., the application expecting the surface contents of the front and back buffers to be swapped after a ddraw_surface7_Flip() call.)