Apple has posted Security Update 2008-003 for Mac OS X 10.4.11 for both PowerPC- and Intel-based Macs. Mac OS X 10.5.3 contains this security update.
Security Update 2008-003 is recommended for all users and improves the security of Mac OS X. Previous security updates have been incorporated into this security update.
For more information and to download the updates:
Security Update 2008-003 (111MB, Intel)
Security Update 2008-003 (72MB, PowerPC)
Security Update 2008-003 (118MB, Server, Universal)
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