Across the line!

Speaking of lines and horrible officiating, how do they miss Donovan McNabb crossing the line of scrimmage before throwing a pass? Actually, how do they ever miss that play, whether it's McNabb or not? That no call bailed the Eagles out of a bad situation (along with the facemask call at the end of the play). Missing calls like that is unacceptable - though not quite as bad as blowing the play to, ultimately, cost the Chargers a game.