Not sure if this has been mentioned in any threads, but I've found "some" success in deleting the channel from the tuner, exiting out of the "local channels" menu, then going back in and either re-adding the channel or doing a re-scan. One of my locals added "THIS" about 2 years ago, then "Bounce" was added about 6 months ago. Less than 2 months ago, the station flip-flopped the sub-channels and, of course, my guide data did not follow the change. A few weeks ago, I tried the deletion and re-adding referenced above, and the guide data was corrected. So while some stations and others recommend the occasional re-scan to make sure you're getting all the right channels, I feel it may be advantageous to either delete channels with suspected or known problems (or maybe delete ALL), save that change to memory, and then re-scan or manually add. You will lose DVR timers for OTA channels by doing this, so they will need to be re-added.