Symptom
When playing a movie in iMovie, there are occasional clicks and pops in the audio portion of the DV footage..
Solution
1. Make sure you have updated to the latest version of iMovie. Check Apple Software Downloads (http://www.apple.com/swupdates/) for information on the latest version.
2. If you are using the latest version and the issue still occurs, it's possible that you have a sound track enabled in the Appearance control panel. This can cause distortions in the audio within iMovie. Try turning the sound track off in the Sound tab of the Appearance control panel.