This update is recommended for all Safari users and includes improvements to stability, compatibility and security including:
Stability improvements for webpages that use the HTML 5 video tag
Fixes an issue that prevented some users from logging into iWork.com
Fixes an issue that could cause web content to be displayed in greyscale instead of color
For detailed information on the security content of this update, please visit this site: http://support.apple.com/kb/HT1222.
I get excited by incremental software updates and I wonder what that says about me as a person. With that out of the way, it still works great like before.