BLUESTAR  I would advise everyone to back up with Time Machine before the update, or just the "Microsoft Office 2008" folder in your Applications folder. After I got highly unstable applications from an update that professes to "improve stability" I restored my entire Office folder with my old apps in it and everything works fine again. Thanks to you Microsloth!  (Version 12.1.1)

BLUESTAR  This update was supposed to be making applications more stable. I have Myday not even launch but crash upon launching. Word crashes every time I simply quit the app. Office Rminders come up with funky graphics. Microsloth is unbelievable! Just shows you what a nasty monopoly can do to software products. Leave Office alone and go for something else and generally avoid ANY Microsoft product in the future. Do not buy anything from them. They should NOT be charging us for this cr.p that simply DOES NOT WORK and you can't get your act together Microsoft! They deserve what's coming to them.  (Version 12.1.1)

DUTCHBILLIE  I just worked out why my machine would not update. I had removed some of the Dock icons of Office2008. After complete re-install, keeping all the icons in the Dock, everyhting updated fine.

That was on the second try, The first try, I had removes some icons after the inital re-install. After that even de 12.1.0 SP1 could not be installed.

Just my two pennies.  (Version 12.1.1)

BACKPACKER  From macrumors:

http://forums.macrumors.com/showthread.php?t=505414&page=3

"Somewhere within the Office 2008 12.1.1 Update package is an item named 'updatables' which shows that multi-language versions of Microsoft Office Setup Assistant are sought, in particular the Plugins/SLT.bundle inside it. This bundle was introduced in the SP1 Update (12.1.0) and is not found in the original MSO2008 install.

Opening up the Office 2008 SP1 Update (12.1.0) package, and looking inside Packages for Office2008_en_core_12.1.0.combo.pkg, I opened this one up with Pacifist to look for the Microsoft Office Setup Assistant updater/installer. Inside, we find the SLT.bundle in its multi-language state. When this is extracted with Pacifist onto the hard-drive somewhere (desktop will do), it can then replace the one embedded in your existing Office 2008 SP1 installation. (Like many, I had also removed all language localizations and, in so doing, changed the SLT.bundle inside Microsoft Office Setup Assistant)

After doing the above, and after a couple of goes (no Safe-boot or logging-out required), the Office 2008 12.1.1 Update went fine, and the 12.1.1 apps work."  (Version 12.1.1)