What does "Bone location is set in local space" mean? I found this in the Relations panel of Bone Data properties:



I was looking for some documentaiton about what this means and how it is used in practice. But i found nothing substantial about this. maybe someone can shed some light on this ?

btw: i have seen the entry How does &#39;local with parent&#39; space work?
But it does not answer this question (for me).
It means the bone behaves 'as normal' and location curves are based on the bone's rest position. If you uncheck it they (the curves/ transform) will be in the rotational space of the armature, ignoring the rest rotation of the bone.
Nathan added this during sintel I believe to avoid having to align bones in the rig. Honestly I think it is a nuisance.