Apple has shipped an updated version of the Security Update 2007-005 1.1 update for Intel Macs.
The new software appeared 30 May and weighs in as a 29.2MB download, available now through Software Update and for direct download from Apple's support website. Security Update 2007-004 has been incorporated into this security update.
The security patch enhances numerous elements of Mac OS X, including the widely-reported iChat flaw.
The update also improves the security of the following system components: bind; CarbonCore; CoreGraphics; crontabs; fetchmail; file; mDNSResponder; PPP; ruby; screen; texinfo and VPN.