I have a Tivo HD on Cox (Rhode Island). I have a problem with some channels accumulating RS errors in the tens of thousands. If one of these channels is buffering, the tuner eventually 'freezes' and just sits on a grey screen until I change channels. This only happens on higher-frequency channels, however; seems to be above 650MHZ or so. Channels in the 400's, for example, are fine. It happens with both tuners, so I know it's not that one of them is bad. Also, I recently upgraded the hard drive and power supply so those are both fine as well. The thing I was wondering about, is that Cox is now using tuning adapters in our area but I haven't gotten one yet. Could that be the cause?