Word X is some sort of Mac OS X-specific version of Word 2001, which in turn is the Mac flavor of Word 2000 (much as Word 2008 is the Mac port of Word 2007). I was using Word 2000 before I updated to Word 2003 and then 2007, so it's roughly equivalent to the version of Word that I was using two updates back. If some of the offending files were from me, that explains it -- they were Word 2003 or 2007. Anyway, I'll try to get in the habit of saving as "Word 97-2003"; that way, anybody using Word 97 or later can read the files. Too bad for people with Word 6.0/95.