I just got back from a great trip with my 5050 but I ran into a strange problem that I need some help with. I filled up several Smart Media cards on the trip so I took them to where I had access to a card reader and a CD burner. The cards read fine and I got the pictures on to the CD but when I put the SM back in my camera to erase them, the screen came up with 2 choices, power off or format media. When I try to format the cards, I get a card error. 2 of 3 identical cards have the problem, the other one is fine. The cards seem to be OK as I can access the cards on the reader, add and delete files to them while they are in the reader. I think what I did to 2 of the 3 cards was to accidently copy the data that I had pulled off of them back onto them. It appears that the camera can not reconize something on the card and will not allow me to reformat the cards. Anyone got any ideas as to what I did to the cards and if I can somehow reformat them?