This is why I have two very expensive bodies...Murphy's Law I also have two cars.... two dogs well, you get the idea.
If you're married I hope you live in Utah!
BTW, Dave Barry also has two dogs, a big one and a little one. He refersn to the little one as his "small emergency back-up dog".
Someone else said that this is unlikely to be a major problem or else they'd be talking about it all over the Web. Well guess what - they ARE! Almost every photo forum with a significant Nikon section has people talking about it.
Speaking as a design engineer, this is exactly the kind of problem that should have been straightened out in preproduction because it's very expensive to fix (presumably by complete replacement) once it's in people's hands.
Also, someone suggested that they can probably fix it with a firmware upgrade. But that depends on the cause. It was proposed that it might be caused by RF interference. That would actually make good sense, because it the bands could easily be accounted for by a beat (interference) pattern between the data getting marched out of the CCD array and the RF signal. It would explain why it seems so random. Someone with access to an RF signal generator (or a ham radio operator) could probably test this. But if it is, it would probably require a hardware fix, such a better shielding.