Since the great DTS-MA update I have not been able to playback any of the trailers that are MP4's. I have a bunch on the PS3 and they don't play back and I tried new trailers and put them onn the PS3 with no luck either. The image immediately freezes up and I have to stop the playback. Any way to fix or any else having the same problem?

Maybe do a system restore?

Please explain how to do the restore?