IK solver modifications

Hi,
I try to write an export script that can export bones animations using IKsolvers but it seems that neither IPO curves nor getLoc/getQuat on bones give the modification due to IK resolutions.

In fact, between two key frames, some bones have moved because of others have. I don’t know how to get this movement or how to compute it.

If anybody have a solution or an idea, please help me.

I´d like to have a solution for that too. In the meantime, “bake” the animation to ipos and export that baked animation.