Security Update 2007-005
Now available via Software Update:
Security Update 2007-005 is recommended for all users and improves the security of the following components:
bind
CarbonCore
CoreGraphics
crontabs
fetchmail
file
iChat
mDNSResponder
PPP
ruby
screen
texinfo
VPN
Security Update 2007-004 has been incorporated into this security update.
http://www.apple.com/support/downloads/
Update procedure recommendation
For important recommendations on applying this update, please see the MacFixit guide on "Safely applying system updates."
Getting the update off your Mac If you are experiencing dire issues after applying Security Update 2007-006 cannot be resolved by common workarounds, you may want to uninstall the update.
This can be accomplished via the process outlined in our guide "How to Reinstall the System (Mac OS X)."