I have a TiVo Series3 HD DVR that was purchased through CircuitCity shortly before they went under. This issue has appeared once or twice before. It has now irritated me enough to post about it. I have done countless searches, but no matter what, it seems that no one is having EXACTLY my problem. I will be watching a television station (live) - today it was AMC, standard definition - and the live video will freeze and unfreeze at exactly four (4) second intervals. While it is 'frozen', the video stream must continue, because it picks up four seconds later in the stream (i.e. - while it is 'frozen', it is skipping four seconds of program, then plays four seconds of program at the correct place (as if it had been playing the stream continuously), then freezes again, etc.) Rebooting the TiVo does not help this issue. The flawed channel still freezes and unfreezes every four (4) seconds, while the surrounding channels continue to play fine. This ONLY HAPPENS ON THIS ONE CHANNEL! All of the surrounding stations I have checked played their video streams without interruption. Rewinding the stream and playing it back results in a little artifacting, but otherwise seems to play somewhat normally. I am unaware of this issue affecting any recorded shows, but I do not know if any shows recorded while this issue was taking place (and on the specific channel). I know this is a TiVo issue and not a Comcast issue because I have a Comcast digital receiver (Scientific Atlanta Explorer 2200) in another room, which plays the same channel flawlessly. I live in Cape Coral, FL. ZIP Code 33904. Local provider is Comcast. I am in the Digital Rebuild (category?). My receiver is a TiVo Series3 HD DVR. It is currently running software version 11.0k-01-2-652. I am using an M-Card to access some of the digital channels. I do not believe we currently subscribe to any HD channels. I don't know what other information you might need to help. I am not sure what information should be kept 'private' (i.e. - so that no one else has access to my account), so I did not post it here yet. Thank you for your time.