Microsoft has posted an update to version 12.2.8 for Office 2008 for Mac. According to the company, the update improves stability and includes fixes for vulnerabilities that an attacker can potentially use to overwrite the contents of your Mac's memory with malicious code - yikes.
Also fixed is an issue in Entourage that causes the program to quit unexpectedly under certain circumstances.
The 332.8 MB update applies to Office 2008, Office 2008 Home and Student Edition, Office 2008 Special Media Edition, Word 2008, Excel 2008, PowerPoint 2008, Entourage 2008, Office 2008 for Mac Business Edition.
Installation instructions are posted on Microsoft's Website.