I purchased my Tivo HD a few days ago and have liked it so far. I am still waiting until this weekend for my cable provider (WOW Detroit) to come out and install the CableCard's. In the meantime, I have been using it for the analog channels and the clear digital channels (local HD channels). Though I can not get channel information on the clear digital channels yet (some other threads have been posted about this) most all channels come in perfectly. That is, except for one which is my local Fox channel, which is experiencing some major macroblocking (it shows up on replays as well) Here are the details on this channel: (analog) Channel 2 (digital) Channel 2.1 if OTA (digital) Channel 202 through my cable provider After reading all the issues regarding macroblocking, I have seen the consensus grow in the correlation between macroblocking and CableCars's. Rather, I am proposing that the issue may be a deeper issue, that being the macroblocking could be related the the digital decoder within the Tivo HD box. Here is why I post this theory. I am able to receive this channel and other local HD channels without any problems on my HD-DVR provided by my cable company (which this box is to replace). Also, I can receive this channel and other local HD channels by running the cable directly into my television as it is able to decode it (a Vizio LCD unit). Do any others with the Tivo HD experience a similar issue in receiving clear HD content via cable, that is people who are not using CableCard's? I just don't want the Tivo engineers scrambling to find a fix to this CableCard issue when it may be related to the decoder, in essense they would be setting out buckets to catch the rainwater instead of repairing the roof! So, if anyone else has seen these issues when tuning to local HD channels without CableCards, post a note. Maybe this will help this awesome unit get patched up quick for all of us!