Hi all, I have a few movies in a m4v format which my ATV2 is refusing to load after i have updated to 4.1. I have watched one already so i know the files work, they work and QT and in iTunes. the are dolby 5.1 too. I get the progress bar and the spinning icon then it just sits there. i can scroll around etc but is does not play. I did see a post about the audio mucking things up but i am stumped at this point. Any ideas people?