Kudos to NVIDIA!
My FC3 2.6.10-1.770_FC3smp system used to freeze / spontaneously reboot about 1/3 of the time with the 6629 driver. I upgraded to 7167 and so far it hasn't happened once! Not only that, but UT2004 seems to run with less lag, especially at the start of the level.
Nice job guys!