High Res Powerbook display issue?

Engadget points to a report this afternoon that some of the new higher resolution Powerbooks are having display issues. Specifically, thin, horizontal "lines" can be seen running the width of the screen, distracting and annoying Powerbook owners. There's a gallery of images here. Users suggest that the issue isn't with the video card, as the problem does not show up on external displays connected to the Powerbooks. It's pretty hard to see in the posted pictures (any photo taken of a display at such close range is going to look pixilated), so we'll just ask you TUAWers: Is anyone having this problem?

[Via Engadget]