I have the 610 and Nikon replaced the sensor due to spots. It has worked perfectly ever since the replacement.
Shellback wrote:
I've have a D610 (for over 3 yrs) with no oil spot issues... The shutter oil spot issue was with the D600 which the 610 replaced... I did a lot of research about the dust issues and when I discovered that Lens Rentals conducted extensive testing of the D610 after it was introduced and they found no oil issues with the D610 I decided to get one - my primary for everything...