Mountain Lion redemption code has already been used
Just gone through the process to get a redemption code for Mountain Lion. Successfully received the PDF that contained the code, tried to redeem it in the Mac App store and got an error saying:
"This code has already been used. Each code may only be used once."
Oh dear. Are they sending out duplicates? What should I do now?
(I have a screenshot if you want to see)
MacBook Air (13-inch, Mid 2012), Mac OS X (10.7.4)