Reported a bug to the libgdx new 3d api.
Update:29 May '13 It was fixed. The 3D animation which I make was using bone controller. The controll-bone does not controll faces, but controls deform bones. Unfortunately, playback is not correct in the new 3d api was released this week. I report it to the libgdx-tracker. It may not be strictly bug. It may not support animation. Nevertheless I hope that this animation to work correctly. libgdx-tracker: https://code.google.com/p/libgdx/issues/detail?id=1465