Noticing on all my Comcast - History Channel recordings when I play back the video has a stutter or jitter especially when panning? This seems to only be happening on the History Channel and on recorded shows not LIVE. I called TIVO support and they believed it was because my signal strength was too strong 100% and mentioned adding an Attenuator. I purchased off Amazon and it did lower my signal strength to 93% .. but after recording shows again this week I am seeing the same stuttering/jitter. I have also rebooted the system several times .. no change and tried changing the video from 1080i to 1080p and even 720p .. no changes. I am considering replacing the hard drive .. but just odd it's only this one channel Thought I'd post here in case someone has another idea ?