http://bugs.winehq.org/show_bug.cgi?id=21534
--- Comment #38 from edward savage epssyis@gmail.com 2010-04-03 02:08:41 --- Screen tearing and performance loss isn't apparently in Compiz shipped with Ubuntu 10.04 (1:0.8.4-0ubuntu13) so I guess we wait a month for this to go away.
Those using Ubuntu 9.10 who haven't updated recently I suggest holding back your Xorg/Compiz updates.
Those who have already updated and don't want to jump to 10.04 can simply open a terminal and run metacity --replace and then play TF2 with Rasmus' workaround.