Those are probably hot pixels, to test this just take a picture with the lens cap on - this picture will come out all black except for hot pixels (dust or lens problems wouldn't show up because there's no light to see them with).
I have no idea what's the acceptable number of hot pixels and when you should send the camera to be fixed but I can tell you how to map out those pixels, this worked for my 550D (copied from my answer on another question)
The relevant part:
Test for dead pixels : Left lens-cap
on, set camera to exposure 30 seconds
black-out image at various ISO
Fix for dead Pixels : Set camera to
perform sensor cleaning mode manually
(not auto) for one minute. You only
execute the function, not exactly
performing the whole sensor cleaning
procedure. Magically, the sensor
cleaning task should shake the stuck
pixels off, if not, repeat couple more
times until it does. Otherwise, time
to call the technical support.
I've tested for hot pixels using only ISO 100 (I'm lazy), the image clearly showed the 2 pixels that caused me to look for this + another red pixel.
After enabling the manual sensor cleaning function (without even taking the lens off) and waiting for a minute the first two pixels disappeared, after 2 more "cleanings" the third also disappeared.