"Known as APPLE-SA-2008-03-18 Security Update 2008-002, it contains more than 40 specific fixes for versions of Mac OS X. The most significant updates include Apache, ClamAV, Emacs, OpenSSH, PHP, and X11. To get the update, go to the Software Update pane in System Preferences, or Apple’s Software Downloads Web site. The update "is recommended for all users and improves the security of Mac OS X," according to the Apple Downloads page.
Also on Tuesday, Apple released version 3.1 of its Safari browser for both Mac and Windows users. The release includes new features as well as security fixes, most of which address cross-site scripting flaws." – Content courtesy of Apple releases massive security update : News : Security – ZDNet Asia