Its could be out of phase any where along the chain from the pre pro on. All speaker manufacturers check the speakers at the end of the line I cant really see one sneaking by but I guess it could happen. I would pull the binding posts out and take a look. The speaker connectors at the drivers are 2 different sizes so there is no way they could be reversed. Truly a strange occurance. I know audyssey often tells me my speakers are out of phase but the next time round it will say they are fine. Maybe Ian or Andrew will see this post and have some insight.
