A couple of weeks ago I thought that I had a file naming issue with my Nikon D7000 the file numbering sequence jumped forward by over 4000 shots. I contacted Nikon Support and they were really helpful and checked every possible cause of the problem. The fault turned out to be was nothing to do with the camera and was caused when the memory card was corrupted after being inserted into my notebook computer. Despite this I was given superb advice and I now have the numbering scheme back to where it should. Well done Nikon.