Motion Trail flip rig

[anouvee]

Hi,

hope someone could help me. I create a spline IK for the spine and enable "Advanced Twist Controls" with Object Rotation Up (Start/End). If I create a motion trail now, everything is fine, but if i bend my spine, no matter which direction and create a motion trail then, the spine flips.

Anyone know that problem or have an idea whats the matter?

Here is a pic
http://picfront.de/d/8sKK