Fire up Software Update, folks, Apple is setting some updates free. iDVD 6.0.4 is now in the wild, and it 'improves overall stability and supports compatibility with Mac OS X 10.5.'
iLife Support 8.1.1 has also been released which, 'improves overall stability, addresses a number of other minor issues, and supports general compatibility issues.'
Apple hasn't posted these on their site for download yet.
Thanks to everyone who sent this in.