Office 2008 users on a PowerPC (PPC) running Tiger (10.4.xx ) that applied the Microsoft Office 12.2.7 updater might need to do this fix in order for the Microsoft AutoUpdater (MAU) to work correctly.
Locate this folder: Library/Application Support/Microsoft
Option 1: If you have not installed 12.2.8 updater….
Remove the MAU and MERP folder (just trash them), and then run the 12.2.8 update. They will get the correct version of MAU and MERP. Restart . . .
Continue Reading: Fix for PPC users on Tiger updating Office 2008