This update is recommended for all Safari users and features protection from fraudulent phishing websites and better identification of online businesses. This update also includes the latest security updates.
For detailed information on the security content of this update, please visit this site: http://support.apple.com/kb/HT1222
You can download Safari 3.2 from here:
Safari 3.2 for Mac OS X 10.5.5 Leopard
Safari 3.2 for Mac OS X 10.4.11 Tiger
Safari 3.2 for Windows XP or Vista