I recently upgraded to Leopard hoping to fix this problem, no luck. i have a collection of DVDs recorded from both Australian PAL and US NTSC television and cable broadcasts. I often recorded several documentaries or segments onto one disk.
I can't seem to use the 'options' to choose either the main or one of the 'extras'. On 10.4, I got an error message, 163 4955 892. On 10.5, it just quits.