Symptom
QuickTime movies have a purple or green tint to them. Applications that use QuickTime such as Final Cut Pro, DVD Studio Pro, iMovie, iDVD, and Preview also have a green or purple tint.
Solution
Download and install Mac OS X 10.2.2 or later. It is available in the Software Updates pane of System Preferences, or from Apple Software Downloads (
http://www.apple.com/swupdates/).