The screen on my iBook has a loose connection. At certain angles it will flicker until I move it.
I hope I don't have to send it back, since it's a US iBook - I bet I have trouble sending it to a UK repair centre if I have to.
Anyone else had trouble? I open and close my iBook about 4 or 5 times a day, so I guess it gets a lot more abuse than most. But the hinge looks sturdy and I expected better.