Apple has released iDVD 5.0.1 Update which updates iDVD 5.0. This update addresses issues related to general stability and compatibility with iPhoto slideshows and iMovie HD. This update is recommended for all iDVD 5.0 users.
iDVD 5.0.1 Updater will update your iDVD version 5.0 if it is in your Applications folder and you have not changed its name. You need an administrator password to install this software. The administrator’s name is shown in the Accounts or Users pane of System Preferences.
More info and download link (2.6 MB) here.