Still no answer on my ticket opened since 1/10. The problem seems to be that the app memory has no limit and balloons up to the an enormous size when trying to run a disc. You can see it happening in Activity Monitor. I did have luck with a normal DVD. It did stop working until the disc was done burning then I got the warning. Instead of force quitting Toast, I relaunched finder and it mounted to the disc. Not the most confidence inspiring experience. Then it hung up on a Blu-Ray. Uggh. They need to fix it.