Apple has released iDVD Update 7.0.3 (29.3MB) and iLife Media Browser Update 2.0 (3.8MB).
iDVD Update “improves overall stability and addresses a number of other minor issues.”
iLife Media Browser Update “improves overall stability and addresses a number of other minor issues. It is recommended for all users of Aperture, iLife ’08, iWork ’08, and Mac OS X 10.5.6 Leopard or later.”
Both updates are available via Software Update.