Weird. After the Broncos lost yesterday, it started snowing in Denver. I lost the signal for the local Fox affiliate. Then I checked the other OTA channels, and the satellite channels, and they all came in strong. A little while later, I lost the signal for the local ABC channel. Switched to local NBC and no audio--all this time, the satellite channels were fine. So I went to the guide to look for a movie, and saw the listings for movie (1992) on 4 of the Cinema 10 channels.
The locals came back after about an hour. My wife wanted to watch "Desperate Housewives" on ABC, and I could only stand about 5 minutes of that, so went down to the basement and played pool. I'm puzzled about the OTA, but everything seems OK this morning. Chalk it up to Halloween and drive on.