Today, Apple released Security Update 2008-002 v1.1 for Leopard client and Leopard server. Software Update gives us the following information about the update:
Security Update 2008-002 is recommended for all users and improves the security of Mac OS X. Previous security updates have been incorporated into this security update.
You can download this update by opening Software Update (Apple menu > Software Update) or by downloading either the client or server installer package from the Apple Support downloads website.