I found a few threads where this issues seems to be mentioned, but no real dedicated discussion about it, so I wanted to find out how widespread this might be. Here's the issue: I have two HR20s and an HR23 (with an AM21) -- up until a few months ago, I was able to record all OTA channels with no problems. At some point, I started having trouble with my local FOX affiliate; if I left any of these DVRs tuned to that channel, when I tried to rewind through the buffer, the whole thing was goofed up. The progress bar would show the name of the current program, but the buffer contained a show that might have aired two hours ago. Attempts to scan through the buffer are not very successful, as it will jump around in odd increments. At the same time, it has become impossible to record any programs from this channel OTA, as they will usually only play for a few seconds and then display the "delete/do not delete" message (though the progress bar indicates that it recorded the entire program). Viewing the channel in real-time seems to be no problem, as long as I don't try to rewind -- as soon as the buffer is called into play, there's trouble. I have found that when I record the same program on multiple DVRs, the point where the recording "stops" is precisely the same on each one every time. So clearly there is something about the data stream that these machines don't like. Not sure what that could be -- I have other OTA recording devices, like a Series 3 TiVo and an Elgato EyeTV, and both record fine on this channel. Some of the previous threads seem to believe this might be tied to a recent software update, so I am wondering how many others are experiencing this problem, and if it seems to be getting worse? More importantly, is this is a "known issue" that will hopefully be addressed at some point?