Apple has DVD Studio Pro 4 to version 4.0.3. The update is available as a 6.8MB download from Apple’s Web site.
The new version “updates compliance for the 1.0 HD DVD Video standard content specification to Tiger and Panther based users,” according to Apple. Users who are working with DVD Studio Pro 4.0 must install this update to ensure that their projects are compliant with the 1.0 HD DVD Video standard content definition.