I don't know if these have already been addressed (I looked in the HR20 bug sticky thread and didn't notice them), but I've been noticing a few new issues in the last week or so.
The most serious one (that was mentioned in the sticky thread) was "delete or no delete" on playback of a recording. I know there is no real fix for this yet, and will have to bide my time.
The next most serious one I have noticed is when I have certain series's set to record on specific (HD) channels, but when I go to watch them they have been recorded from the non-HD version of the channel. This happened to CSI last week (although the recording was lost due to the above issue anyway), and it was about to happen to the Sunday night FOX animations tonight (Simp., Am. Dad., Fam. Guy) but I noticed it in time and switched it back. This has also happened to others in the past, but only on local channels. The channel it switches to is an "SE" channel, for what its worth, and I don't know what that means. For example, Fox here in Seattle is "13 KCPQ" but there is also a "13 SE 13" channel, and that seems to be the one it switches to.
Finally, I have noticed on the HD channels recently that there is a lot more pixelation glitches throughout the broadcasts. They ususally don't impact the audio signal, but it can be a bit annoying. We have had a few windstorms here recently, but I have checked the satellite signal strength and they do not seem to have been impacted (nearly all above 85, most above 90).
Thanks for the help. If these issues have already been discussed, I apologise and would appreciate being directed to the appropriate discussion.