For those wondering how to do it from cmd line on a *nix OS, use curl: curl -X POST http://10.10.10.10/lineup.post?favorite=x35
That command "deletes" channel 35.
@jasonl: do you know what is the URL to set a favorite? and what's the URL to clear a favorite?
Reception, channel detection, network issues, CableCARD setup, etc.