hrm, try shooting in raw and dumping it into your nikon raw program and see if the spots are still there?
i think quite unavoidable these days, mine was perfect when i first bought, then after a while 2 spots appeared, but they aren't really very consequential to me
actually the thing is, if it doesn't really affect your pictures on the whole, and easily resolved
don't think too much about it bro , it's just like dust,
if you keep cleaning your sensor to get rid of one spot you end up introducing more spots :bsmilie: