steppin_razor_LA writes: "In the name of security, Office 2003 SP3 disables a number of features instead of fixing them. For example, Office 2003 SP3 breaks the ability to view TIFFs by removing the file association between them and the Microsoft Office Document Imaging. Corporate users are left with either trying to find a third party TIFF viewer or attempting to replace the removed file association and ignoring the security warnings.
From Microsoft: ".Tif files and.mdi files are no longer associated with Microsoft Office Document Imaging. Additionally, these files no longer open in Microsoft Office Document Imaging by default."