Mac OS X Update 10.3

Delivers enhanced functionality and improved reliability for Mac OS X v10.3 Panther and is recommended for all users. Key enhancements include improved file sharing and directory services for mixed Mac and PC networks, more robust printing to PostScript printers, improved font management, updated Mail and Address Book applications, new ATI and NVIDIA graphics drivers, FileVault, FireWire 800, WebDAV and USB Printing improvements from Update 10.3.1, and previous standalone security updates.
Important Note:
Apple has identified an issue with external FireWire hard drives using the Oxford 922 bridge chip-set with firmware version 1.02 that can result in the loss of data stored on the disk drive. Even with the improvements available in this update, Apple recommends you update the firmware on your FireWire drive. Please contact your drive manufacturer for more information.