Cube.as has bad UV mapping for the cube6 option.
Hacked up a working version until the devs get round to fixing it
Hurt brain too much to do a single loop for each mapping type so cheated and did if else
http://www.shrewballooba.co.uk/CubeSides/
Just rename it to whatever you want
http://www.shrewballooba.co.uk/CubeSides/CubeJB.as