I just tried reformatting it again in every way I can think of...with the camera, with disk utility, with the camera using low level format. Each time I reformatted it, I reinstalled the PS.FI2 file on the root along with vers.req and DISKBOOT.BIN and the CHDK folder. None of the reformatting options solved the problem. The firmware update option just refuses to show up at all no matter what I do. Any other suggestions???