A new nvidia gfx driver is available from here. This version includes many bug fixes, mainly for GeForce8 and GeForce9 series GPUs. Recently supported are the following:

* Quadro FX 3600M
* GeForce 9800 GX2
* GeForce 9800 GTX
* GeForce 9600 GT
* GeForce 9600 GSO
* GeForce 9600 GS
* GeForce 9500M GS
* GeForce 8400
* GeForce 8400 GS

This is in Cooker already. It will be backported to 2008 Spring (and probably 2008), but not yet, as first we want to fix a udev bug relating to the automatic loading of video card driver modules - if we don't fix that first, it'd be possible for some people to experience problems related to the backport.