When I press P (to play) on my 13 inch. MacBook Pro,
the screen displays vertical lines. It used to work correctly.
A couple of odd items:
When I try and do a screen capture of the vertical lines using cmd-shift-4
the screen returns to rendering correctly as I drag!
When I created another user on my MacBook Pro and tried using P in the BGE, everything renders correctly.
I have tried completely reinstalling MacOS 10.7.3. It did not help.
I have reinstalled blender several times and used CleanGenius and it did not help.
Any and all help would be appreciated.