http://bugs.winehq.org/show_bug.cgi?id=25299
--- Comment #4 from Henri Verbeet hverbeet@gmail.com 2010-11-26 13:21:09 CST --- I'm pretty sure that's something in the driver, please report on bugs.freedesktop.org. Before doing that you may want to give a current git version of Mesa a try though, there have been some changes to GLX.