I posted a topic like this right after I bought a brand new powerbook back in March.
The superdrive would not read a good number of DVD's that I loaded.
I would burn DVD's on another computer and then tried to load them onto the powerbook and it would not work.
I thought it was maybe a faulty DVD; but the DVD's worked fine in every other computer I tried them on, PC's, Mac's, desktops, and even older powerbooks (like models from 5 months previous).
I tried the DVD on all similar brand new powerbooks in the apple store and same result, it wouldn't read.
Has anyone come across the same problem?