Warzone 2100 & 270.41.03
Warzone 2100 2.4.3 is almost unplayable due to the amount of Xid's and Nvidia Waits during gameplay. It will never freeze completely, but every few minutes (1 - 5 minutes) it will freeze for upto 20 seconds. It will always recover and sometimes the mouse will freeze with the game, but always returns to normal after a short wait.
I have also noticed with this driver ProjectM music visualizer will also crash much more often than with 270.29. I have noticed in UT2004 similar issues of short freezes. Same with Call of Duty Black Ops and Starcraft. Bug report is attached.