I was setting up some recordings of Dirty Jobs (awesome show!) on the Discovery channel, and I noticed that starting around August 13th, shows were coming up as HD (which they never are in), starting around the 13th or 14th. I can only assume that this is the simucast of discovery as it was also on channel 278, or whatever the regular channel is for the Discovery Channel. (If I got these numbers wrong, my HD is via projector, and I fire it up just to watch TV/movies- so I'm going off memory here!) I just recently (arrgh!) found out that my Chicago Comcast Sports was broadcast in HD, but under the exact same channel number as the SD feed! I didn't list it in the Main Favorites list! I missed out on alot of local sports in HD! I haven't checked other shows yet, I just stumbled upon this by accident prior to retiring for the night. I looked under the settings for my favorites channel guide, and did not see a duplicate channel # for the Discovery Channel yet (ie. -seperate HD channel).