Title says it all. It doesn't show up on the Desktop in OS X, nor in Disk Utility, and in Vista, I can see it in "Computer", but clicking on it crashes Windows Explorer. I have some pictures on it already, but wiping them to reformat isn't an issue. I just don't know how I'll reformat when neither OS can see it... I'm connecting it with a Targus USB to SD adapter and it's an SDHC 4GB card. Any help would be greatly appreciated.