But on a brand new ibook? Call them, I am sure they will send it back. If not, I think they have a 2 week return policy... If that doesnt work, take it to an apple store.
My old laptop had a line of stuck pixels, about 6 in a row going down from the top of the screen and I had to deal with that for a couple years and now I get a new one and dead pixel right away, lol just my luck