Unpleasant tasks on any clichés.

First impression: The device is pleasant to use and the first pictures seem very successful on the screen of 3.2 inches of D600.
Yet viewing photos on a larger screen, I realize that many more or less visible jobs are present ...

After going from Nikon France to clean the unit, the problem reappears quickly ...
And today (Sept. 2013), no suitable solution was offered to me at Nikon France.

Finally: The D600 is a very disappointing camera, I regret my purchase and I am greatly disappointed in the service of Nikon that has not really helped.
I find myself on holiday to clean my sensor just 2 days with a bellows to limit the number of tasks on my pictures (there still remains).