I've got a humanoid rig of bones and nulls that I can't get into Compose properly. When I try to cut the motion, it disappears from playback, though I can still see the motion curves inside the clip. A simple scene with nulls worked, so I guess it's something weird about my heirarchy.
My Tracks settings are,
Source: Current Group (selected my animation controls group in the list below)
Motion: Bake Motion
btw apparently if you have messiah installed on a network drive (woohoo physical dongles!) you have to add a registry key for the docs to work. http://www.helpscribble.com/chmnetwork.html