http://bugs.winehq.org/show_bug.cgi?id=28858
--- Comment #3 from Vitaliy Margolen vitaliy-bugzilla@kievinfo.com 2011-10-22 21:32:19 CDT --- winex11drv/wineserver/user32. Or something highly specific to the game, which can be anywhere, like difference in d3d timing.