We have just received this from one of our contacts at Dish Network regarding the video jitter many are reporting as well as compression issues with the MPEG4 channels.
There are 2 separate issues that they may be experiencing. The first is the known issue with the 622 that will be fixed by a future software update, ETA unknown, but it is pretty high on the list of things to fix.
The second is compression issues with the MPEG-4 channels. This is also something that we are trying to resolve quickly.
So to sum up, customers will most likely experience a lot of noticeable jitter at times on MPEG – 4 HD channels, especially locals, and not nearly as much noticeable jitter on the SD channels.
Hope this clears up some of the questions you have.