I too am having issues with my New D7000. Only done a hand full of shots and noticed some round grey spots. They appear to look like Oil spots to me. Cleaned it twice. Checked it and ok. After a few uses back to square one with another spot on my sensor. I have a D90 and never had spot or dirty sensor issues. I am dissapointed in this Nikon version and what is obviously a dirty ssensor issue for many. I suggest Nikon to investigate this Lemon of a problem and fix it before sending more of these cameras out there for people to willy Nilly buy like this. I am reluctant to even update on teh D7100 just in case it has the same issue? Not very re assuring Nikon. get with it on quality control!!