Outlook fax attachments show ghost faxes when viewed

We have a domain environment with SBS 2003 using Exchange, latest service packs.  Fax services on SBS server.  Outlook 2003 and Outlook 2010.  NOD32 everywhere, Exchange Module also.

Problem:  Users are experiencing "ghost" images of previous faxes.  And nO, it has nothing to with this being posted on Halloween!  

Basically one person (let's call her Jill) receives all faxes via email with attached fax in .tif format.  She then forwards them to appropriate recipient (also on domain).  Recipient then views fax in Windows Picture and Fax Viewer.  When viewing attachment the original is there, but sometimes there is also a fax that had been received previously.  Oddly enough, over the course of multiple new fax attachments, it often seems to pull the same ghost pages.  When comparing recipients view with view of same email by Jill (see above), Jill sees no ghosts.  This does not happen to all users.

If immediately upon viewing the attachment, user goes to print, it prints just the original fax.  If ghost pages are scrolled and viewed, will also print the ghost fax pages.  If attachment is saved, it will include ghost.

We tried IrfanView with limited success.  At first it seemed to work but users report still have issue.  We tried clearing the Outlook tempfiles with script that launches upon user login, but more limited success.  Making matters worse, this client must adhere to HIPAA.standards so it would be bad if one of these ghosts got forwarded to the wrong client.

Ideas?