Unity and FBX issues

[JeroenKoffeman]

So far we have really enjoyed the FBX export functionality of ASP.. But we do have some issues with importing bone animation in Unity.

1. Small jittering in the feet of characters with Ik-bones.

2. Jittering of a bone that was set to: Independent angle, however other animations with the same bone worked fine. When we turned off 'independent angle' the jittering was gone.

3. One of our animations, a jump of a character (where several ik-targets are moving at the same time) we get extreme jittering in the unity editor. In unity preview animation, the animation looks fine, but as soon as we play the animation in editor, it starts to jitter. We REALLY don't understand.

4.On import, for some reason we have to cut 1 or 2 frames of each animation in the beginning, and cut a random amount of frames after the animation end.

Perhaps someone has similar experience or can shed some light on one of these problems?
Thanks in advance!