Available via software update (Macs) and this download page - summary says "This update is recommended for all Safari users and features improvements to stability, compatibility, JavaScript performance and security. Requirements: OS X 10.4.1, OS X 10.5.2, Windows XP, Windows Vista" Apple also has posted some Safari 3.1 related docs with more details on the changes - see "About the Safari 3.1 Update" and "About the security content of Safari 3.1". If you find this update fixes or breaks anything (including safari addons) let me know.

	Read more at AccelerateYourMac
	www.xlr8yourmac.com/index.html#S24091