Hello everybody. I've been playing around with my new Rebel XT from Dell, and I decided to try testing for hot/dead pixels. I took 1- and 30-second exposures with the lens cap on, and found one dead pixel (white) and one or a couple hot pixels (blue). Then I took some pics of my white walls, and found much more interesting results. In the resized example pic below, you can identify 40+ dark spots.
Are these hot/dead pixels? If so, why did only a couple show up in the lens-capped pictures?
I know what the problem is not. It is not my lens (problem happens with both of my lenses), or my walls (identical pattern of spots appears when photographing various white walls and ceiling).
Does anyone have thoughts? It seems like a significant problem to me, so I'm planning to call Dell tomorrow and ask for a replacement. Is there something I'm missing? Thanks for any help...
(edit: the quality of my uploaded pic is quite diminished, but you can still see the strange dark spots I'm referring to)