Apple has posted a Security Update labelled "2006-002" through the Software Update utility:

Security Update 2006-002 is recommended for all users and improves the reliability and security of the following components:

apache_mod_php
CoreTypes
LaunchServices
Mail
Safari
rsync

Additionally, this update incorporates Security Update 2006-001, which improves the security of the following components:

apache_mod_php
automount
Bom
Directory Services
iChat
IPSec
LaunchServices
LibSystem
loginwindow
Mail
rsync
Safari
Syndication

For detailed information on this Update, please visit this website: http://docs.info.apple.com/article.html?artnum=61798