Not sure, but if you're submitting a word doc, my guess it's probably a word doc with notes. you could dl it and try looking at it with a hex editor for some clues.
often files will have stuff like %png as the first bytes in them because programs don't rely on file extensions to determine file type. for instance, renaming a .jpg to .gif doesn't make it a gif file.
edit: if you have notepad++ you could open it w/ that too.
Last edited by acdcfanbill; 03-03-2012 at 08:34 PM.