For a while now I have been hearing a rattling/fart sound from my cab, and finally tore into it before my gig last night since I couldn't really stand it anymore. I found quite a large section where one of the cones came apart from it's surround. There is only one speaker with any kind of damage, and it otherwise looks fine. There is no tearing whatsoever on it, it just looks like it wasn't glued properly. Is this a common defect with mesa? I have to try to get the original receipt for repair under warranty, and hopefully I can just send them the one speaker for repair versus shipping the cab, or two 4 hour round trips to a repair center....neither of which being worth the while to do.