Ok so I have had my D90 now for about three days having recently been a canon shooter. I have been having some problems with noise with anything over 500 iso. I turned on the high iso noise reduction to normal and same thing. As a last resort I changed the high iso noise reduction to high and get the same amount of noise. Please let me know if there are any known tips/tricks, good noise reduction software, or if I should have my D90 looked at...