[quote="clogz"]. O fellow APUGgians! Check your cameras!
Did this a little while ago when I found some fogging with an EOS600. The source was the foam seal betwen the back and the body. I dug the old foam out but have not yet found anything to replace it with. I tried felt but that was too thick. Am still looking for a solution to the problem but have replacement cameras so I can cope with what I have.