I just found an interesting bug but I'm not certain where to report it...
System:
MacPro1,1
14GB RAM
Symptom:
I was finding that I couldn't move art in a given document on the right side of the document border when I figured out that PS thought that there was a panel there.
Screenshot:

http://cl.ly/1df08432d80f65521940
Solution:
I don't really have one aside from avoiding trying to dragging art over there. The other tools appear to be unaffected (brushes, lasso, etc.). Just the Move tool appears to be affected.