When playing ioQuake3,openarena, ioUrbanterror at random times, there is maybe one totally black frame (a VERY short blackout) and then the keyboard glitches..

Keyboard glitch meaning that the currently pressed key unpresses (even though I'm holding it down), so i have to lift the key and press it again to start walking again..

Sounds like a minor thing, but its damn annoying..

Warsow, Quake4 and ETQW does not seem to suffer from this problem.

My system:
Nvidia 8800Ultra (driver version 169.09)
2 gb ddr3
Intel E6850 (3 ghz dualcore)