Trying to book:
EWR -> MCO
MCO -> CRP
On Multiple Destinations page

Accidently mistyped sometthing like:

EWR-> MCO
MCR -> CRP
and received the following error:

! Could not find an airport for crp. Please enter a new city, airport, or airport code.

I think I would have heard if my home airport had been wiped off the face of the earth.

I suspect the error should have read:

! Neither Continental nor its codeshare partners serve Melchor De Mencos GT (MCR) using a Continental flight number. You may modify your search criteria, or call 1-800-300-1547 for assistance.