oh man! I feel good now because it was not only me who has this problem. I did try to burn 3 DL-DVD with my Toast Titanium 9.0.2 with two different DVD drivers
but every time it will crash at 74% or 82% and it will show me a Message that I need to restart my Leopard. I can burn with windows vista using Nero with out any problem just with Leopard...

I have two IDE DVD Drives and one SATA.