Last month we reported that Nikon is being sued by D600 customers who have complained about unwanted spots appearing in their photographs. The news comes days after China's state television broadcaster, CCTV, reportedly slated the firm for 'selling defective products and poor customer service', according to an article published by The Financial Times on 16 March. In a statement released today, Nikon apologises for any concern and inconvenience caused, adding: 'We will continue to offer users of the D600 a special service with which cameras are inspected, cleaned, and if necessary, shutter and related components are replaced free of charge, even after the product warranty has expired. 'However, if a number of multiple granular black spots are still noticeable in images captured with a D600, upon which the above service has been performed several times, Nikon will replace it with a new D600 or an equivalent model.'