So tonight was a near disaster. Some of our files somehow got corrupted on one of our compact flash cards. The files were fine looking at the back of the camera a couple of days ago, but something went wrong where we couldn't even copy the corrupted files off the card tonight. After we ran around like crazy people for a while, I ran across software called PhotoRescue. It recovered every last image that was corruped. What a life saver. Crisis averted.