I use PowerPoint a lot, and as I saved a presentation i saw a warning that
I've never seen before.  It read:

"Privacy warning: This document contains macros, ActiveX Controls, XML
expansion pack information, or Web components.  These may include personal
information that cannot be removed by the "Remove personal information from
file properties on save" option on the Security tab of the Options dialog box
on the Tools menu."

I have not done anything differently on this presentation then other
presentations.  Is this something to worry about?  What does it mean, wan why
did i get it?