D600 Dust Problems:
I've had my D600 now for (3) months, with 24-70mm 2.8G ED glass, never experienced dust problems. However I did note that when the D600 came out of the box, the plastic (lens) body cover on the camera was loose, in fact it wouldn't fit, wrong size, slightly too large. I asked the sales pro guy to make note of it, thankfully so far, no problems.
Error:
Delete "plastic lens cover" should be Plastic cover for body of camera".