I don't admit to being very knowledgeable about this kind of stuff, but it appears that they are licensing Microsoft's FAT system... specifically their technique of squishing long file names into a system that only supports 8.3...

It was pointed out to me that this was an attempt to hit up the camera makers for using FAT for their smart media and compact flash... But I have never seen a camera that uses long file names? I would have to assume this is a non event?