I live in the Washington, D.C.-Baltimore region, and because of fortuitous location of my house, I get pretty good OTA reception with my rooftop antenna. I get a nice assortment of 30 OTA channels out of D.C. and another 30 out of Baltimore. From both cities, I get all the major networks, PBS, and lots of sub-channels that I like to watch, including Decades, Me-TV and others. While I realize that the DirecTV's AM21 tuners are no longer "supported," I have nevertheless found them to work decently for my purposes. I use them on several of my HR24 DVRs and, while they don't pull in every channel, I like the integration of the OTA channels with my DTV program guide. But two days ago, something strange happened. After rebooting a couple of the HR24s, I noticed that the program guide on both were only showing the Washington channels, and NOT the Baltimore channels. So I ran the OTA setup on the HR24s again. Still no Baltimore channels. I took the added step of running a CLEARMYBOX command on each of the DVRs, unplugging and replugging the USB from the DVR to the AM21, and re-booting and running the Initial Setup again. Still, no Baltimore channels. Not one. And all the Washington stations appear just fine in the guide, and tune in perfectly. It seems to me that the problem is on DirecTV's end. I can find nothing obviously wrong with the HR24s or the AM21s. For some reason, it appears that DirecTV is simply not providing the program guide for any of the OTA Baltimore stations, and since there is no program guide, the channels don't appear. One other important clue: To test my hypothesis that the problem is on DirecTV's end, I did another initial OTA setup with the HR24 and told it to look for channels associated with zip code 95201 (that's Sacramento, Calif.) I did this because that area has channels 13.1 and 13.2, and a few others that I get in Baltimore. As soon as I ran the scan, the channels appeared in the DirecTV program guide, albeit with Sacramento program listings. That tells me that my AM21 tuner is working fine and that, for some strange reason, DirecTV's database isn't providing any OTA programming guide for the Baltimore channels. I know DirecTV's program guide OTA listings are provided to them by Tribune or some derivative company of Tribune. Is it possible that Tribune has just dropped support for all the Baltimore OTA stations and is no longer providing guide data for them? Any thoughts/suggestions would be most welcome.