http://bugs.winehq.org/show_bug.cgi?id=31710
--- Comment #8 from Alexandre Julliard julliard@winehq.org 2012-09-16 16:16:21 CDT --- If the OpenGL window is a child window, that's expected, we don't have proper clipping of child window updates yet. You can set ClientSideGraphics=N for the time being.