OK, here's a new one for the group:
Just tonight, the horn on the Winged Messenger started honking by itself. Not stuck on, like on TV, but occasional random toots, like when you honk at a friend. I disabled the horn/light flash when locking the doors via the key-fob weeks ago, and I've tried removing the batteries from both key-fobs, so that's not it, either. Finally had to disconnect the horn to keep from annoying the neighbors...God bless computer controls...