iDVD is a disaster!
Just last week I had to burn 30 videos, each 2 minutes long into categories. When I created a folder in iDVD with 2 more folders inside I lost the "highlight" effect.
I mean, when navigating I was not able to tell what folder or movie I was on! after spending many hours and DVDs burned I realized it was a bug in the software.
I tried to open the project in DVD Studio Pro and it was not possible anymore! DVD Studio Pro no longer recognizes iDVD projects as it used to.
I had to start from scratch creating every new folder, icons, names, everything!