I had the same exact issue with my 722 when I got Dish 12 months ago. No one at Dish could figure it out and they sent me a new 722. Same thing. Got a lot of useful info and theories on this forum but sadly nothing seemed to work. It was not too bad in my case as it only occurred on a few channels. Never figured out why it did this on some channels and not others. Most of the 7-8 channels it happened on were SD movie channels like HBO. Sorry to say I could not get it fixed no matter what I did so I just decided to live with it. Funny thing is about 2 months ago it stopped doing this and now everything works fine. I have no idea what happened but assume it was a software thing in some 722s that an update eventually fixed. Sorry to hear you are having the same problems. I would say try and get a replacement DVR and see if that helps.