John Christman experienced a fairly inconvenient glitch when he purchased OS X Lion using Paypal: He was charged an extra 121 purchases of the operating system that he did not actually make. Including the intentional purchase, Christman was charged a grand total of $3,878.40, even though he only meant to spend the $31.79 one copy of OS X Lion costs. He claims Apple blames Paypal for the error and Paypal blames Apple.
He has a theory as to what caused the glitch, and feels it is a new feature that allows iTunes to automatically download previous purchases: