http://bugs.winehq.org/show_bug.cgi?id=22617
--- Comment #30 from rocko rockorequin@hotmail.com 2010-11-29 22:05:32 CST --- I still get the glitches rendering the gun with wine 1.3.8 (currently I'm on wine-1.3.8-21-g04278cb) when first loading a level or moving to a differnet sublevel. Changing the resolution while in the game fixes the problem.
However, I guess that's a different bug from this one, which does appear to be fixed in in 1.3.8.