> So, I was wondering if I should clean the sensor >(although I've never done it before but I think I can, based >on what I've seen on YouTube) and try again, or send it back >and try another one (I'm sure I'll have to pay shipping)?
Mine showed dust in first few hundred shots. I ran multiple in-camera cleanings each time it became aggravating and that cleared up my camera. I am now around a 2500 shots and it is not getting any worse - just 4 or 5 spots. Now I will do a more thorough cleaning and I expect the camera is settled in for the long haul.
Just a perspective,
"Extraordinary claims require extraordinary proof " - Carl Sagan