I am actually having issues playing the videos, as well. They play okay, but I have to click to advance each chapter. It's not nearly as onerous as the previous poster indicated, though, so maybe that's why you didn't understand what she was getting at. It's more like a click every 3-5 minutes, not every 20-25 seconds.
I just took it as the intentional design (which I still think it is), but in case I'm mistaken and you'd intended for it to automatically advance to and play the next chapter after finishing the previous, I'll tell you what software I'm using.
Ubuntu Linux 8.04 Hardy Heron
Mozilla Firefox 3 Beta 5
Shockwave Flash player for Linux 9.0 r124
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