Can anyone speculate as to what this mark might be?http://homepage.eircom.net/~ThePlayer/IMG_2941.jpg
It's the circular, faintly grey spot, near the upper right hand corner.
It looks transparent. The texture of the wall seems to be visible through it.
I have taken the same shot with a couple of lenses, so it is definitely the sensor.
Also, I have examined the sensor closely and I can't see anything on it.
Very annoying. Even more annoying is to discover that this camera, bought in B&H in December, is not covered under warranty here in Europe. A major black mark against Canon, in my opinion.