After breaking 64 but compatibility with its first release Apple have re-released the Security Update and dubbed it V1.1, the details can be viewed below;

Security Update 2005-007 delivers a number of security enhancements and is recommended for all Macintosh users.

Security Update 2005-007 v1.1 replaces Security Update 2005-007 v1.0 for Tiger systems Mac OS X v10.4.2. Users who have already installed v1.0 on Tiger systems should install v1.1.

Security Update 2005-007 v1.1 provides a combined 32- and 64-bit version of LibSystem to replace the 32-bit version that was delivered in v1.0. No other changes have been made in version 1.1.

This update includes the following components:

AppKit
BlueTooth
CoreFoundation
cups
Directory Services
HIToolBox
Kerberos
loginwindow
Mail
OpenSSL
QuartzComposerScreenSaver
Security Interface
Safari
X11
zlib

For detailed information on this Update, please visit this website: http://www.info.apple.com/kbnum/n61798