Apple has updated DVD Studio Pro to version 2.0.5.
The update is available using Software Update or for direct download from Apple's Web site, though a form must be filled in to download this.
The update requires that DVD Studio Pro 2.0.x be installed. Very brief notes on the release from Apple say the update: "Includes critical fixes for the placement of the dual layer break point on DVD-9 titles."
System requirements for the update include: 733MHz G4 or faster with an AGP card; 8MB video memory (though 32MB is recommended); at least 256MB RAM; 20GB hard drive space; a SuperDrive; Mac OS 10.2.6; QuickTime 6.4 and DVD Studio Pro 2.