Oh crap. The "wars" have started between Sabre and Air Canada.
Those of you who use mostly American carriers, pay attention too 'cause many US carrier contracts with Sabre expire on July 1st I think. You'll be suffering with the same kind of crap many of us are suffering right now with AC.
Sorry to sound like a Domsayer but it's one helluva pain to book people when you can no longer see (or even book) the inventory when you simply ask for an availability request!!!
I hope this all boils over real fast and you'll have nothing to worry about.