This was back around 2005, so I imagine the software has improved since then, but... Sonic Scenarist for DVD authoring.
The thing we hated most about it apart from the slowness (computers were slower back then too, but anyway) was that it auto-saved after every action and had no undo. If there was an option to turn this off, we couldn't find it.
It was all too easy to select a bunch of items and accidentally drag them to the wrong place, and so we ended up just making a backup copy of the project file from time to time, and before attempting any type of operation that might mess up.
The thing we hated most about it apart from the slowness (computers were slower back then too, but anyway) was that it auto-saved after every action and had no undo. If there was an option to turn this off, we couldn't find it.
It was all too easy to select a bunch of items and accidentally drag them to the wrong place, and so we ended up just making a backup copy of the project file from time to time, and before attempting any type of operation that might mess up.