Over the past couple of weeks, I have run the Office 11.5.4 update on a few iMac (PPC) running Mac OS X 10.4.11 having problems after updating to Office 11.5.4 -- it turns out that for non-admin users, Word, in particular, becomes subject to crashing or spinning wheel of death until the app is forced quit... so, if you are Admin user,it may not matter but if you have users that are not admins then beware...

I have not determined why there is an issue with this update - I do believe that Microsoft has actually done a very good job with support to Mac Office up until Office 2004 rev 11.5.3 and along with Open XML Converter it has address the issues with the new format, introduce with Office 2007 (.docx, pptx, .xlsx). NeoOffice or Apple's iWork are now reasonable alternatives to the pricey MS Office - does Microsoft remember (or not) that they used a similar strategy against WordPerfect and won! market share will continue to erode at these price points.