Apple, Inc. quietly updated iDVD 6 to 6.0.4 a few days ago. According to its support page, the description of this update is shown as
“This update improves overall stability and supports compatibility with Mac OS X 10.5.”
You can update iDVD 6 through Software Update. You can also download the software update file and install it manually.
Click on the button for more information.
iDVD is a product of Apple, Inc.