As the rumors said 10.4.3 was released today, to summarise the news (according to Apple).
The 10.4.3 Update delivers overall improved reliability and compatibility for Mac OS X v10.4 and is recommended for all users.
It includes fixes for:
AFP, SMB/CIFS, NFS and FTP network file services
AirPort and Bluetooth wireless access
Core Graphics, Core Audio, Core Image, and RAW camera support
disc recording when creating and burning media
.Mac sync services
Spotlight indexing and searching
Dashboard widgets: Dictionary, Flight Tracker, Stickies, and Unit Converter
Address Book, AppleScript, Automator, Dictionary, Font Book, iCal, iSync, Mail, and Safari applications
Disk Utility, Keychain Access, Migration Assistant, and Software Update
compatibility with third party applications and devices
previous standalone security updates
Available now in update manager