I'm doing a <5 min simple video with voiceover and music track. The exported QT files have chroma green frames before/after dissolves and fade ins/outs. Also, timeline playback crashes on transitions and cuts only. Keep getting playback error message about dropped frames. Says to change "Unlimited RT" which isn't in any pull-down menu. Would I need to reinstall the entire FCP Studio (Upgrade)? Thx for your help. Cheers!