I have a 211 and I think the 5.1 audio problem that existed before the 6 channels switched to MPEG4 got worse after the switch. ESPN2 is really bad. I think it's a combination of the two. I called E* tech support and reported it.
I called Dish tech support today and was told to try and do a hard reset of the receiver. It didn't help. They told me to contact the retailer that did the install because it must be something with the install of the dish that was wrong. I explained that isn't logical as it only happens on ESPN2 HD. Mike