This is some real mess with these new drivers from nvidia. Like they let some raw apprentice to decide if drivers fulfills whql standards and can be used by hundreds of thousands of people.
Going back to point, I had problems with these 280.x (a message bubble in the tray informing that "screen driver has stopped working" or sth like that and many texture issues in games like Aion). Then I read about these problems that many other people had them and they recommended a previous ones which were 275.33, as a stable ones. I tried them and everything was fine.
Then, few weeks later I found that new drivers were released, 285.62. I installed them, and they were working fine few days. But since yesterday I've been experiencing weird behavior especially in Aion. Textures and general graphic's artifacts, weird dots on screen and overall discolouration, screen freezing that forced me to alt+tab or ctrl+alt+delete to open Task Manager (to leave the game and bring it back eventually). Have the same thing that was with 280.x, sometimes - tray's bubble that "screen driver has stopped working" - alternately with screen freezing and graphic's artifacts.
This is in polish language version: http://i.imgur.com/NCXIg.png
This occurs even while just browsing websites in Firefox, e.g. Screen goes black, then recovers and brings this message. I hadn't had this with 275.33 yet, till I installed these 285.62 few days ago...
I have been using Win7 32 and GF GTX 460 for a quite long time and I didn't have any issues before. Now I've returned from these junky 285.62 to 275.33 (uninstalling from Control Panel and doing clear installation after OS reboot) and still got mentioned problems with graphics... Especially when I run Aion or run Win7 performance test (it throws up some dots, different colour lines - etc crap - and behave like I had 256 colours set on screen; after test is complete, everything goes back to normal). Wtf - I ask? Should I use Driver Sweeper and give it another try? Or what?
Now I'm a bit pissed, cause I once read some official rummors that there were some drivers in the past that were burning GPU - inappropriately were managing fans' speed, which were not working properly while being in a huge 3D stress. Hope it isn't my GPU, but just a software's matter.