The 10.4.2 Update delivers overall improved reliability and compatibility for Mac OS X v10.4 and is recommended for all users.
It includes fixes for:
[ul]
[li]file sharing using AFP and SMB/CIFS network file services
[/li][li]single sign-on authentication and reliable access to Active Directory servers
[/li][li]autologin for managed user accounts
[/li][li]AirPort and wireless access
[/li][li]Core Graphics, Core Audio, Core Image, including updated ATI and NVIDIA graphics drivers
[/li][li]Finder updates including finding on Kind and using Slideshow
[/li][li]synchronizing your iDisk with .Mac
[/li][li]installation reliability
[/li][li]managing Dashboard widgets
[/li][li]Address Book, Automator, iCal, iChat, Mail, Safari, and Stickies applications
[/li][li]compatibility with third party applications and devices
[/li][/ul]
For detailed information on this Update, please visit this website: http: http://www.info.apple.com/kbnum/n301722