I have the identical same issue. Same driver version but an nVidia Quadro NVS 120M. I don't think I had the problem from day one though. This is a new laptop with a clean Vista install. I think the problem started sometime after I installed several applications. If you find a solution please post back. Likewise if I find one I'll post it here.
Thanks
EggHeadCafe.com - .NET Developer Portal of Choice
http://www.eggheadcafe.com