When I see a reference to the Office Button, I have to figure that any reference is to Office 2007….I believe that is the only release that has an Office Button? This link has a number of tips to try, for all versions from 2003 to 2010.
It looks like this question has come up on the Office forums as well. Try this fix:
Go to Office Button –>Word Options–>Trust Center–>Trust Center Settings–>Privacy Options and then make sure “Remove personal information from file properties on save” is not enabled.
If it doesn’t work, there are other fixes noted in those forums.