Apple has just released Mac OS X 10.4.1 update through the Software Update utility and its told [1] macosXrumors the software update was imminent.

The update weights 37.7MB and provides the following improvements :

The 10.4.1 Update delivers overall improved reliability for Mac OS X v10.4 and is recommended for all users. It includes improvements for:

file sharing using AFP and SMB/CIFS network file services
using DHCP in wireless networks
user login when accessing LDAP and Active Directory servers
core graphics including updated ATI and NVIDIA graphics drivers
synchronization with .Mac
Address Book, iCal, Font Book, Mail, and Preview applications
Dashboard widgets: Address Book, Flight Tracker, Phone Book, and World Clock
creating and burning disk images using Disk Utility
compatibility with third party applications and devices

For detailed information on this Update, please visit this website: http://www.info.apple.com/kbnum/n301517 [2]