"same old question" in a diff way- Has anyone NOT had a problem with sensor dust issue in the D600 .

One thing I think can be a better indication is amazon "verified purchase" reviews. Yes people can make a small issue big even on these reviews but if you see a pattern, it is probably true. The verified purchase allows one review of the item per purchase and you can update as you go. I tried posting to b&h and adorama and some how my not so glowing review never saw the light of day. They both have some way of selectively picking reviews that make the list. Mine was very professional and detailed. I think amazon is a good indicator. Not all D600's have the issue but a large enough number do. I still say to wait till a CONFIRMED fix is in place. Even if that was found today, I would wait some time to buy one. Nikon pushed out the units knowing of this issue and never halted the sales of it even after the issue was pointed out. They had one goal in mind and that was to beat canon to the FX 2k price market and they did it knowing they had a faulty product and that includes the useless wu-1b which was also an obvious rush job.