http://bugs.winehq.org/show_bug.cgi?id=14633
--- Comment #32 from Mehdi Yousfi-Monod mehdi.yousfi@gmail.com 2010-03-03 21:58:18 --- I did experienced the bug on Windows, with the same hardware config. Changing z-buffer setting thx to the Morrowind Graphic Extender fixed it.