I tuned in to look at the Spurs game (2nd game) and couldn't watch more that a few minutes. I didn't get the pixelation, but the video stutter and judder was there, along with some horizontal black spikes in the picture that have been present in varying degrees and times on my 622 since I got it.
By the way, I noticed a good deal of video stutter and judder on several HD channels last night. TNT was the most unbearable to watch. After I looked at acouple of other HD channels, all the audio was lost on all HD channels. I just turned it off and went to bed.