A friend emailed me a 35 mb quicktime movie file that he made on his MAC. I'm on PC. When I double click the icon, it plays in the quicktime player. But, when I import the file to the Vegas 6 timeline, all I get is the audio portion. What's going on here? Something in settings?

Have you updated to the most recent Quicktime? 7.4 just came out. I have had similar issues and upgrading or reloading has fixed the problem.