MAC OS X 10.5.6

10.5.6 is out and here's a brief summary for it. This update addresses issues in - 10.5 "Leopard", Graphics,  Mail, iCal, Airport, iChat, Safari, and MobileMe sync.

Leopard - fixed a number of stability and security issues. Including issues with Chess, DVD Player, adds Trackpad Preference Pane is Sys Pref for portable Macs, smart card compatibility, and updates time zone data.

Mail -  improves overall performance and reliability, also a number of minor issues

iCal - improves performance and compatibility with MobileMe

Airport - improves reliability when in a high traffic network

iChat - minor issues and improves compatibility with Microsoft Office

Safari - improves compatibility with Web Proxy servers

Mobile Me Sync - all MobileMe devices will now sync within one minute

Graphics - improves gaming performance for all Macs; graphics improvements for iChat, Cover Flow, Aperture, and iTunes; fixes distortion with certain ATI cards

go to http://support.apple.com/kb/HT3194 for more information