Jebus...
The 10.3.8 Update delivers improved compatibility and reliability for Mac OS X v10.3 "Panther" and is recommended for all users.
Key updates include:
? improved OpenGL technology and updated ATI and NVIDIA graphics drivers
? improved file sharing and directory services for mixed Mac and PC networks
? improved compatibility for third party applications and devices
? previous standalone security updates
For detailed information on this Update, please visit this website: http://www.info.apple.com/kbnum/n300569
For detailed information on Security Updates, please visit this website: http://www.info.apple.com/kbnum/n61798
Update: The update went "Ok", I think. No weird things happening yet.