First a thanks to SD 630 support for all the explanations and attention given this matter.
Regarding the receiver Lockup issue -this happened to me at 15:17 Thursday as one tuner was recording NUMB3Rs on 615 and the other was set to live TV on an SD channel (probably 505, but I don't remember for sure). I was in the guide exploring "NEW" tags about a week in advance. Upon clicking the EXIT the full tv picture came back, frozen, with no OSD data displayed. Audio continued. Pressing any key had no effect - no menu, no guide, no channel change, no power off, nothing. Unplugged power and replugged to reset (lost 4 minutes of NUMB3Rs). On the plus side, I really liked how the receiver dealt with the recording with a power loss. It maintained the recording in a single file - and the red spot in the progress bar indicates the missing data. I really don't think that there is a magic combination that can make the receiver lock up reliably -- it seemed to be a fluke.
The remotes repeating - I do have 5 remotes in the house 2 set to the 630, 2 set to a 530 and one to a 505 (Every STB is available as a channel at every TV in my house, so we have "downstairs" and "upstairs" remotes with IR repeaters), both PVR's also have UHF antenna's installed. I am relatively certain that the repeating problem has occurred when I am home alone, or when no one is touching another remote at the same time. It is intermittent and difficult to reproduce - makes it all the more of a surprise when it happens - really bad when it happens on "skip ahead".
Another thing - regarding resetting PVR priorities. I understand the searching though the database to re-figure all the recordings and that this could be time consuming, but couldn't this be a background task? How does the PVR handle this when you DON'T change priorities and new guide data becomes available (as will happen every day or few days)? It doesn't lock you out at a random time and display "please wait".
Probably more, but I'll save it for a later post.