I shoot with a Canon 5D using a variety of cards. I have recently run across a problem where my camera decides, yes all on it's own, to process JPGs instead of Canon RAW files. I know, I know, you may think I've changed it without knowing. Not true. As a matter of fact I just shot a card of some interior shots and there were 39 files on the card and just 2 of them are JPGs. Yesterday I shot an entire card only to return from my walk with a card full of JPGs. What a pain! Any ideas?