Hit that Software Update to get a comprehensive security updates and some new Java goodness.
Security Update 2009-001
AFP Server
CVE-ID: CVE-2009-0142
Available for: Mac OS X v10.5.6, Mac OS X Server v10.5.6
Impact: A user with the ability to connect to AFP Server may be a able to trigger a denial of service
Description: A race condition in AFP Server may lead to an infinite loop. Enumerating files on an AFP server may lead to a denial of service. This update addresses the issue through improved file enumeration logic. This issue only affects systems running Mac OS X v10.5.6.
Apple Pixlet Video
CVE-ID: CVE-2009-0009