Microsoft's recently released Service Pack 2 for Office 2008 for Mac makes it impossible for many users to open Office files created on PCs.
The "update" - Microsoft Office 2008 for Mac Service Pack 2 (12.2.0) - was released last Monday. In its release notes, Microsoft promised that it would "improve stability, reliability, and performance." It also includes a new app called Microsoft Document Connection to aid in working with files on a SharePoint site or in a Microsoft Office Live Workspace.
Unfortunately, what the release notes don't say is that Service Pack 2 also makes it impossible for many Office 2008 for Mac users to open some Word (.docx), Excel (.xlsx), and PowerPoint (.pptx) files created by PCs running Office 2007 for Windows and saving into the Open XML format.