it would be great if you guys experiencing that problem could somehow supply your files, where this error happens.
I get the error on all video files I have tried, seemingly regardless of format. Also tv streams. As mentioned above, screen configuration fixes things for the session.
What may have trigger the behavior was setting font size to large at one point. After reading in these forums that that may have caused this problem somehow, I set it back to normal (unreadable) format. Several upgrade versions later this unfortunate problem persists though...