Couple of threads in the Adobe Photoshop forums about this. Seems to be due to a corrupted preference file. I forget the key sequence that you hold down when starting PS to clear the preference file (CTL-CMD-SOMETHING obviously, a quick search ought to get it).
The problem seems to come back and Adobe stated they were working on it.
|Street Food by poppyjk|
from Your City - Local Street Vendor
|Tomato Clownfish by chile7236|
from Fish world
|Vermont-Autumn by kevinplui|
from My Best Photo of the Week