I used to have this problem once in a while with CS5, though not sure why it was only occasionally. I cannot see any format image that I open in CS6. The file opens fine - no error message - and then the screen is just blank. This used to be an Edit>Preferences>Performance issue, where I would uncheck the Enable Open GL Drawing box and all was fixed. But there is no such box in this new version.
I did try: Open>Preferences>Performance, and changed the Advanced Settings to Drawing Mode = normal. But no results.
Thanks for your help.