I don't think the Compatibility checker gives you that. You might be
able to identify more of the specifics by doing something like:
a. make sure you have saved in a format that doesn't lose anything
(e.g. .docx/.docm)
b. then do the save to the format you want
c. use (say to Word 97-2003 format, if that's what you're doing)
b. use Review->Compare (Word 2007) to compare the two and see what
shows up.
Never done it myself but it's probably where I'd start.
Peter Jamieson