I’m having the exact same issue with PP CS6. This is quite frustrating, as I edit a lot of still image videos where I need to key-frame movement and scaling across time. I never had this issue in FCP, even with very large, hi-res image files.
In my case, I can see the image clearly while scrubbing with the play-head, but as soon as I stop, the image either disappears or becomes a scrambled mess on the screen.
Interesting point here: This problem only started to occur AFTER I installed my Quadro4000 card.