Help please!! I've been having occasional hiccups with my DirecTV HR20 DVR that I was finally able to pinpoint, and it's related to WCCB. (My new favorite HD news station!)

Every so often while watching a program from "My Playlist," the picture and sound would freeze and not respond to most remote commands. I could stop the program and return to the list. "Resuming" the same program would cause it to play from the beginning instead of where it froze. After this sequence happened several times, pressing play on ANY previously recorded program would cause it to jump right to the "do you want to delete?" screen. I would usually reboot the DVR and silent mumble about how much I miss my old Tivo...
Lately, I noticed a pattern. When these lockups happened, the tuner was always on 18-1. Sometimes recording a program, sometimes buffering live tv, but always on 18-1. The past two monday nights trying to watch MNF delayed while recording "Prison Break," Saturday afternoon switching from live baseball to view a recording of Sesame Street for my son. And then yesterday, after the conclusion of the Cowboys/Redskins game to watch "Football Night in America" on the playlist. When I tuned away from 18-1 and restarted the program everything was fine.
Thoughts?
Bob, have you heard of this problem before?
Thanks for your help!