Os 10.9.4
Apple Intermediate codec. there is audio and video. I can start playing the file fine and fade it in without any glitches but when trying to stop it with either changing the play mode or using a Int>0 mode and fading down; I get a glitch for a second on my other layers that are up when that layer with audio stops.

My 10.8 machine with the same content does not have this issue.