Along with the Mac OS X 10.6.3 update, Apple also released Security Update 2010-002 for Leopard users on Monday. Just like the update for Snow Leopard users, the Leopard update includes a long list of security fixes.
The update includes security patches for Mac OS X 10.5.8 that address issues with the built-in firewall, iChat, Mail, printing, graphics, disk images, FTP, QuickTime, and more.
Security Update 2010-002 requires Mac OS X 10.5.8 and is available as a free update via the Software Update application, or as a downloadable installer at the Apple Support Web site.