Yep, I had problems with the 326.xx, can't remember what I've gone back to at home as I'm at work. I had issues with a couple before that, 314.xx springs into my mind but I don't know for good or bad reason.
It could just be a corrupt driver and you may find reinstalling 275.33 works fine again.
When it was happening to me I checked the event logs and a nvlddmkm.sys issue was either causing it or being caused by it just as it happened. Lots on the interwebs about this but nothing concrete to do apart from try other drivers or reinstall current.
Edit, the driver I had installed before the black screen issues used to freeze everything and turn the curser to 8-bit colour, with an obvious increase in size. It was hideous.
__________________
|