This issue is fixed in the Word 2007 hotfix package that is dated June 20, 2008. Therefore, you should apply and install this hotfix package.
For more information, click the following article number to view the article in
the Microsoft Knowledge Base:
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
Check whether the problem is fixed by verifying whether the Ref field updates correctly. If the Ref field is correct, you are finished with this article. If the problem is not fixed, you can contact support