I am very lucky to have bought TWO D200's with no banding whatsoever (at least that I have been able to determine through all the accepted testing methods). I bought a third one for my father though and, wouldn't you just know it, banding. So, I have given him one of mine so he doesn't have to screw around with it. At 80, he has better ways to spend his time. Now, this may have been asked a couple hundred times, but how long are you afflicted folks waiting to send your body to Nikon. Yesterday? Today? When the hub bub dies down a bit? Or, only after you've heard that the best possible solution to the issue has been determined? Please do not split hairs over the term "best possible solution" but maybe just say the best solution developed in the next six months? As long as it isn't effecting normal photos (which this isn't - this is a GREAT camera), I'm not seeing a need to rush, but I'm wondering if one waits too long if Nikon will see it as a tacit acceptance of present condition and refuse to fix later.
But, I've heard very mixed results as to whether the "fix" was fully successful at this point in time. I suppose if they "fixed" mine now (even if a partial) and there were no other unsavory side effects AND they would take it back again later if they come up with an even better solution, I'd send this one in now. THAT's, I guess what I am trying to determine. I have no issue with waiting. Like I said thes eare stupendously wonderful cameras and the banding is not a common annoyance - but something I'd like to address definitively at some point - provided I don't wait beyond the point where Nikon will address the issue. Glad I bought the 2 year ESP for $99. Thinking I will just ride this out awhile.
I sent mine as soon as I saw the banding. It went to El Segundo and was returned ten days later improved but not fixed.
If you're out of your exchange/refund period with your retailer, I would wait a bit to see if a real fix emerges.
If you can still exchange/refund, I would. Personally, I would get the refund, wait until I know the problem has been solved and re-buy. That's better in my mind than continuing to play the lottery with a succession of bodies and endless cyles of test-exchange-test.
"Everything in the world may be endured except continued prosperity." - Johann Wolfgang von Goethe