i was getting the tvapp 00206 error to. i went to settings on guide menu ( little gear by search Box .upper right )
and then the Playback Prefrences.. then TURN OFF Play best Available . Seems its related to HD Chanells when i stream thru my computer. So need to stop chanel selection from auto going to the HD version chanell you want to watch. You can at least see the Low quality chanell version Until they fix the dang stuff.
that is no "fix" watching streamingtv in standard def when you are supposed to be getting HD is not a legit fix. This has been going on since March 8th.