Not a multi-cam edit.
I have 3 layers of video and two layers of audio.
The entire purpose of this timeline was to test the claim on the Apple website that FCP6 can play back any resolution on the same timeline in realtime. I have specifically chosen shots from many different codecs and resolutions, added graphics over dissolves, and generally did whatever I could to trip it up.
Apparently I did too good of a job tripping it up.