Same thing with my Pathfinder Beta (and the other books in the shipment). It looks like the books were put into a box that was slightly larger than the size of the books. So as the box was jostled during shipping, the corners of the box were smashed, and thus the corners of the books inside got smashed. And I'm a stickler for keeping books in a pristine condition.
Otherwise, I was happy that my order had processed, shipped and been received in a quick manner.
Thanks, Lisa, for looking into this. The whole Paizo crew rocks!