Mac OS X 10.3.6 update is now available through Software Update. This update provides the following improvements:

- improved file sharing for Mac (AFP), UNIX (NFS) and PC (SMB/CIFS) networks
- more reliable network automounts and launch of network applications
- improved OpenGL technology and updated ATI and NVIDIA graphic drivers
- additional FireWire audio and USB device compatibility
- updated Calculator, DVD Player, Image Capture, and Safari applications
- improved compatibility for third party applications
- previous standalone security updates

For detailed information on this Update, go here
For detailed information on Security Updates, go here

Apple has also updated DVD Studio Pro to version 3.0.2, adding double layer media compatibility and improving stability. It's the first time Apple supports officially the DL format.