Word documents showing old content

I have a very strange issue that I am having trouble finding a solution.  I have a client that one of their offices have four computers.  They all access the same files from the same server location.   On three of these computers, when they open their office documents they display properly with the correct font and inline pictures.  But on a computer we just recently replaced, with the exact same version of MS Office, when they open these exact same word documents, it is bringing up content that they say was in an older version of the document from 2006.  Font is different, some of the pictures are different.  But I have verified multiple times that they are opening the exact same file.
I have tried uninstalling and reinstalling Office 2007 pro plus from the system,  I have deleted the profile settings specific directories under the local and roaming microsoft folders.   I have tried copying the document to the local desktop and it does the same thing.
The only thing I have found that seems to fix the issue is opening the document on one of the other computers that it opens right on, making a small change like adding a space, and then saving it.  This does something to the file and then this other computer is now able to see the correct content.
Is there any reason this one computer is seeing old content in these word documents as where these other three computers are seeing the newer content?

they are running a mix of windows xp and windows 7 systems.