That still sounds like a video driver bug.
Did you restart Photoshop after turning off OpenGL drawing?
And have you talked to NVidia about this problem?
Thanks for the quick response,
Restarting Photoshop with OpenGL disabled unfortunately doesn't fix the problem.
I left a topic of this issue on the NVidia forums, and might try updating to the latest driver.
Definitely try the driver update.
Driver updates solve many problems - though they occasionally bring new ones too.
Just updated the driver to version 314.07 and PS is still behaving the same way. I don't recall getting any errors with my drivers, either.
I opened the same files that have been giving me trouble in CS4 as well, and it's the same problem. I don't know if this problem is memory related, but purging the cache didn't fix it either.
I've never experienced this problem outside of using the transform tool with the Animation panel open, and ram/disk space haven't posed any problem on my setup. Any suggestions?