I have 2 16GB SxS cards that have always been used without fail in my EX1. Today, we fire up the camera, and the cards are not recognizable by the camera. It gives the incorrect media error. Can't seem to reformat them in the camera. Try them in another EX1, same problem. Try upgrading firmware... problem persists. I'm convinced now its an issue with the cards. Putting the cards into the computer the SxS media logo shows up, but the card is unreadable. Try formating with disk utility into FAT32 drive... problem persists. Being pretty experienced with P2 cards, I'm fairly certain that I just need to format the cards in the camera to restore the cards registry structure then it will be recognized... I just can't seem to do it. Any thoughts?