in my case I was watching fox sports 2 settings on all boxes 1080p 60hz. All running rocket portal 11. I havent been on the box as of lately but will give it a go tonight and see what I can come up with in the way of channels for you all and the times it happens. Just an FYI just as the other posters have said it starts off with a small delay then just get worse the longer you watch.
Cool, thanks wickedjoker. I am also running 11. rocket portal at 1080i/60hz. Mine also starts with small delay and gets so bad commercials get out of sync with audio. Unwatchable.