My girlfriend just bought a new 15 inch powerbook from her school bookstore. When we opened it, and started to move our finger on the mousepad, we felt two distinct long bumps. So I looked at the mouse pad at an angel, and it looked like there were two lines on the mousepad. So then I slowly moved my finger across the mousepad. I can feel two bumps. Now, since she spent 2500 on this machine, can she get an exchange or do you think the bookstore will give her a hard time. If the bookstore does, what should she do? It was bought today and plan to return tomorrow. Any advice would be helpful.