MS Office 2003 SP 3 does create some problems. Just in case it does, here are some fixes
The following KB articles document emerging issues for Office 2003 SP3:
The AutoCorrect feature does not work in Outlook 2003 after you install Office 2003 SP3
http://support.microsoft.com/kb/943519/en-us
The Fast Saves feature in Word 2003 no longer functions after you install Office 2003 Service Pack 3
http://support.microsoft.com/kb/938808/en-us
You receive an error message when you try to open a file or to save a file after you install Office 2003 Service Pack 3
http://support.microsoft.com/kb/941636/en-us
You are unexpectedly offered Office 2003 Service Pack 3 when you use Microsoft Update, Office Update, or Automatic Updates
http://support.microsoft.com/kb/943135/en-us
Error message when you try to install an Access 2003 add-in for all users by using the Add-In Manager on a Windows Vista-based computer: "There was an error adding to the registry"
http://support.microsoft.com/kb/938809/en-us
You cannot open Microsoft Excel 5.0/95 Workbook files that contain Visual Basic for Applications macros in Excel 2003 after you install Office 2003 Service Pack 3
http://support.microsoft.com/kb/938806/en-us
You may experience issues when you run the Microsoft Office Document Imaging program after you install Office 2003 Service Pack 3
http://supprt.microsoft.com/kb/938813/en-us