I've noticed since updating to 169.xx (well, I've only actually used 169.07 and 169.09) that ut2k4 now suffers from some horrible corruptions/artifacts. I've taken a few screenshots to give you an idea of what I mean:
A lot of guns, such as the rocket launcher and lightning gun fire a weird looking block. This same block can be seen in the flame in the first link. The main menu in the game looks fine also, except the sub menus like settings and join game are also showing weird corruptions.
I'm running a x86_64 2.6.23 SMP kernel, with the latest nvidia drivers. If you need any more information please let me know.