I'm having some issues with my newly-acquired Roamio (the base model). It seems similar to issues that others have had in the past with Premiere boxes. It appears that some channels will not tune (I have a CableCard under Comcast). I've gotten V52 and (maybe?) V53 errors. I've noticed it only on HD channels, but that's what I watch 90% of the time, so I don't know if that's significant. More interestingly, even when I can get channels, sometimes they're blocky and pixelated (like when there's a weak signal). Here are a few interesting things though: 1. It seems to get worse the longer the Roamio is on. In other words, everything almost always works well after a reboot, but then the situation degrades. 2. It seems as if the higher numbered HD channels are more likely to be untunable. 3. Most interestingly, I NEVER have this problem when I go into the "Test Channels" dialog in the CableCard setup menu. It only happens when I try to watch TV as normal. Needless to say, this is fairly frustrating. Does anyone have any insight here? Should I just be asking Tivo for a replacement box? Or is this some more widespread software issue? Or some issue not related to the Tivo at all?