Bug fixes! Performance enhencements (non-steroidal)! It’s a bird, it’s a plane, no it’s Mac OS X 10.4.2 – only a couple of weeks late. Download it now from Software Update. Here’s the poop on what it does:

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:

• file sharing using AFP and SMB/CIFS network file services
• single sign-on authentication and reliable access to Active Directory servers
• autologin for managed user accounts
• AirPort and wireless access
• Core Graphics, Core Audio, Core Image, including updated ATI and NVIDIA graphics drivers
• Finder updates including finding on Kind and using Slideshow
• synchronizing your iDisk with .Mac
• installation reliability
• managing Dashboard widgets
• Address Book, Automator, iCal, iChat, Mail, Safari, and Stickies applications
• compatibility with third party applications and devices

Cool!