I had trouble with CS5 crashing every time I tried to rotate a PNG, so I opened up CS6 (which I'd been avoiding due to habits), and found that WHEN YOU ENTER A GRAPHIC, IT GOES TO THE FRAME THAT YOU'RE ON. Depending on how you animate, this may or may not be amazingly handy.
Also CS6 doesn't seem to crash every few seconds. (but still, ctrl+s constantly)
I felt the need to share this story.