Two weeks later and I have still been unable to sucessfully install the SMC 1.1 update, and nor have my colleagues. I have also contributed to a thread on Sophos' forums, as I suspect it might be related to SafeGuard. When performing a manual verbose install through Terminal all seems fine but the SMC version remains af 2.3f32 :S
/Volumes/MacBook Pro Retina SMC Update Manual $ sudo installer -verbose -pkg MacBookProRetinaSMCUpdate.pkg -target /
installer: Package name is MacBook Pro Retina SMC Update
installer: Upgrading at base path /
installer: Preparing for installation….....
installer: Preparing the disk….....
installer: Preparing MacBook Pro Retina SMC Update….....
installer: Waiting for other installations to complete….....
installer: Configuring the installation….....
installer:
#
installer: Optimizing system for installed software….....
#
installer: Optimizing system for installed software….....
#
installer: Optimizing system for installed software….....
#
installer: Optimizing system for installed software….....
#
installer: Optimizing system for installed software….....
#
installer: Optimizing system for installed software….....
#
installer: Optimizing system for installed software….....
#
installer: Optimizing system for installed software….....
#
installer: Optimizing system for installed software….....
#
installer: Optimizing system for installed software….....
#
installer: Optimizing system for installed software….....
#
installer: Running package scripts….....
#
installer: Running installer actions…
installer:
installer: Finishing the Installation….....
installer:
#
installer: The software was successfully installed......
installer: The upgrade was successful.
installer: The install requires restarting now.
/Volumes/MacBook Pro Retina SMC Update Manual $