Do any of you see this problem?

When opening an existing project and running it in the full screen preview mode, all pictures look fine. But after doing some editing on the story board and then jumping back to the full screen preview mode, most times the pictures are now displayed in a low resolution mode. The only work around that I have found is to save my project, exit, and come back in. The pics display in the full screen preview mode as they should at that point, at least until I do some more editing.

Same thing happens on two different systems.
Windows 7
Movie Maker 2012

Any fix for this?

Thx in advance