So today I switched from XP to Win7, and quake 2, 3 and Quakelive all have issues with gfx and opengl it seems. I can play q2 and q3 in high res (in q3 up to r_mode 8), but not in full screen. In q3 I can kinda go fullscreen, but I still have black bars left & right.
When I go fullscreen in ql, the game starts to act crazy, with heavy flashing and the window losing focus (cursor and taskbar visible). But if I keep on clicking to regain focus, the game turns out ok after a few seconds, and I can play like before.

Other games, like CoD4 and Trackmania, work fine. Cod4 works in my normal (native) resolution 1680x1050, on 120hz.

I'm running a Nvidia GTX 275 (Lightning) card on a Intel i7 2,67Ghz processor. Monitor: Syncmaster 2233RZ.
I tried to downgrade the gfx drivers (3 times, from 260.99 back to 257.21), but that didn't help.

Any advice anyone?