<< I did the same. Picked up one today. But I am not sure if the rebate will be valid.
bira >>
When you got back, you are basically doing a return and rebuy. They'll give you a new receipt with the valid date and that's the receipt you will use for the rebate. The CSR said it's no problem and I didn't even have to say much. He just took care of it as I'm sure they have done this many times. But if you are unsure, just ask them.