Ok i'm worried I've just started using my 20D and i've noticed that every time I take an image I get a strange mark on the right hand side of the image. It isn't crap on the lens as I've tried my 2 other lenses and they all give the same result. It isn't crap on my LCD as I've uploaded the images to my PC and the mark is still there. I'm wondering if it is a body fault in which case i'm gonna need to send it back to where i got it from asap. The photos below show the mark i'm talking about. Any thoughts?