These are
full WHQL beta drivers
& the first non-beta release 310 driver set. Seems like pretty good improvements all around.
Release notes (PDF) hereEDIT: looks like a flubbed release and they have since been changed to *beta* drivers on Nvidia's website.. although they are distributed in the standard non-beta fashion.
This comment was edited on Dec 4, 2012, 18:23.