For anyone who has a D600 still.
Dear _______, Thank you for choosing Nikon for your photography needs. Nikon Inc. is contacting you regarding your D600 D-SLR camera. As you may be aware, Nikon Inc. recently issued a Technical Service Advisory for Users of the Nikon D600 D-SLR camera. This Advisory related that some users of Nikon's D600 D-SLR camera have reported the appearance of tiny spots on certain of their images. Not all users have experienced this issue. Nikon has thoroughly evaluated these reports and has determined that these spots are caused by dust particles which may become visible when the camera is used in certain circumstances and/or with certain settings. It is a well-known fact that the presence of dust particles cannot be completely avoided when using a D-SLR camera even after normal sensor cleaning procedures, because of a number of factors including components moving at high speeds when images are taken, the use of interchangeable lenses and the different environments in which a D-SLR camera may be used. As part of its customer-service commitment, Nikon is providing a customer-service measure to reduce the potential impact of dust particles on images taken by its D600 D-SLR cameras. Nikon has resolved this by making available to you (even if Nikon's product warranty has expired) this customer-service measure, which includes the inspection, cleaning and replacement of the shutter assembly and related parts of your camera, FREE OF CHARGE as well as the cost of shipping your D600 camera to Nikon and its return to you. Once again, please understand that regardless of this service, your D600 camera as is the case with all D-SLR cameras, will continue to require normal periodic sensor cleanings.
Apparently the threat of a class action law suit still works!