Hi, I just downloaded the polyhead modeling tutorials and I'm having the same exact problem on my mac. I see the video, but I don't hear any sound at all... I'm using a dual 867mhz G4, so I don't think its that my machine is slow. Have you guys gotten close to finding an easier workaround then converting the movies on a pc? Maybe you could just encode the video the same way that you did the hand tutorial- I can hear the sound on that one fine. Sorry, if I wasn't supposed to reply to this post or anything, I'm a new user.