If you bind the keyboard to expand and collapse the collection view, everything works fine. If you expand the collection view, and then drag a song into a deck, you are no longer able to collapse the collection view with the same key until you de-highlight the song in the collection by clicking on the separator bar containing the mix vibes logo.
You can load a song with a key and browse through the tracks with the up/down arrows, but you can't use the mouse or the collapse part of the binding doesn't work.
More to come