Nvidia has released new Geforce/ION drivers, version 196.34 beta. The new drivers basically fix an overclocking bug found in version 196.21. It seems there are no improvements other than that, but the company recommends users install it anyway.

You can get them here:

GeForce 196.34 beta (Windows 7 32bit)
GeForce 196.34 beta (Windows 7 64bit)
GeForce 196.34 beta (Windows XP 32bit)
GeForce 196.34 beta (Windows XP 64bit)