I recently received this email.
TECHNICAL SERVICE ADVISORY FOR USERS OF THE NIKON D600 DIGITAL SLR CAMERA
delighted at the prospect of having a know issue repaired at no cost to myself (other than the absence of my money machine) I sent it in.
Here is the only correspondence I received over the 16 days the camera was away.
Here is the document included in the box when I unpacked it.
I appreciate Nikon’s efforts to make good on a nagging issue.