I have my ragdoll constrained by five WorldPointConstraints. I had him touch a physics box I had on the ground with his weapon (just another physics box attached to the ragdoll's hand), and received the following exception:
"IComparer (or the IComparable methods it relies upon) did not return zero when Array.Sort called x. CompareTo(x). x: '' x's type: 'Constraint' The IComparer: 'Henge3D.Physics.Island+ConstraintComparator'."
This is not the first time I have gotten Constraint sorting errors; I think I posted the other one a week ago.