I am looking for comments/suggestions for cause/etc. for an effect I have not seen before in my camera. It manifests itself as one or two red squares ... one bigger than the other ... and a couple of times just one square - that appear in finder while viewing the scene and also when the image is reviewed. BUT they disappeared when image is enlarged. They also seem to have vanished after a few additional photographs. I don't know why they appeared or what they were or what made them leave ... and if they will come back again. Any ideas? see here: http://www.davidhazy.org/andpph/2013-docs/2013-red-squares-5D-4437.jpg The camera is a Canon 5D MII Thank you, Andy from Rochester
