reh said:Both of my iBooks (800MHz G3 and a 1.2Ghz G4) have done that. It's caused by the somewhat tight hinge. I wouldn't worry about it unless the gap becomes really large.
How big? If it's bothering you and it's still under warranty, give Apple a call. Otherwise, the cost of repair might be a bit much for a mostly cosmetic defect.lewie109 said:It kind of is big..........