Don't be so quick to blame Apple. The logo can still be removed. I'm still able to remove it in the iDVD/General preference pane. Try this basic troubleshooting fix :
1 - delete the IDVD preference file, com.apple.iDVD.plist, that resides in your
User/Home/Library/ Preferences folder.
2 - delete IDVD'S cache file, Cache.db, that is located in your
3 - launch IDVD and try again.