I've had a couple times where my HDHR has missed a recording. Here are the symptoms:
- Tuner light blinks. (the one next to the ethernet light)
- VFD continually displays "Recording.." even hours AFTER the recording was supposed to end.
- MythWeb shows the recording as "Currently recording"
- no screen grab pic
- shows as 0 B

Other info:
- So far the failures have only been on one channel --WTXF-DT 29, an OTA channel in Philly being pulled from Comcast Cable, I only record a few programs from this channel, but the wife records a lot of History Channel which has been fine.
- I have not and any problems watching this channel in live tv.
- So far only the first tuner has had a problem, but the second tuner is only rarely used.
- I have plenty of disk space. (/myth/tv is 240G free on a 500G XFS SATA)
- I have plenty of net bandwidth (HDHR is connected to BE's GB ethernet card, via a GB Ethernet switch)
- Problem recurs even after a reboot (I'm a longtime windows user)
Nothing that helps me is happening in the BE logs:

The "finished" and "rescheduling" entries tell me there's something wrong, but I can't figure out what...

Any ideas?

Looks like I figured it out. Comcast remapped some channels. This is further confused by the fact that there's SD versions of the channel on QAM as well as HD. They only moved the HD channels. So any HD channels still record fine.

Grrr.