I'm not going to send mine in unless the problem is isolated and a fix is certain. I think this is a hit and mis tactic by Nikon. Throwing a new shutter in sounds great, but it seems like a bandaide. I'd rather clean it every few months now that it's diminishing on mine. I'm not going to let the dust make me dislike the D600, but it's making it easy to dislike Nikon due to the approach they are taking. They know what is wrong, but it will cost too much to admit it.
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