Upload & Sell: Off
I appreciate the comments. Like Leighton I tend to shoot wide open or close to wide open, so I probably wouldn't be complaining too loudly about dust bunnies. It is nice to hear that problems don't become evident on every camera. I may also get relief by virtue of the fact I tend to buy used cameras rather than new ones. Hopefully, when I arrive at the decision point and locate a clean D600 at a fair price, the growing pains will be passed. And yes, as Chris noted, I shoot exclusively with manual focus Nikon glass so AF-ON is superfluous to me...