I had a problem with it crashing but believe that was to do with the generating of the disk content.

In the end I did a save as of my project to a different name and deleted stuff until it worked. I found in my case it was the DVD menus I had created so in the end removed those and recreated them. Problem was solved in my case.

I have also heard that if you have music that runs off the end of the movie you can get lockups and crashes.

Generally I find Pinnacle to be a good piece of software but sometimes it get's it's knickers in a twist in the internals of your project and doesn't recover until you take the brute force approach with the delete key.