call me sad but i was thinking about this post last night in bed... hehe thats that this site does to people. and to be fair, it seems that the only logical solution was that someone got a copy of your key tag barcode thing and used that to make a key suitable enough to work with the buttons on the fob (i.e. unlock and lock) however the immobiliser code failed in the key for whatever reason (or the physical key itself). parhaps it would be worth posting in the dealer section about the garage you took it too and see if ANY one else has had suspect goings on.