I'm no newcomer to Poser. But I feel for the originator of this string, as I've been fighting a curious "feature" of Poser since Poser 4 was a baby (and into SR4 of Poser 5). Has anybody figured out how to switch between IK and non-IK for segments of an animation without screwing up previous hard work? Works fine for static images, but have yet to find it useful for animation. I sometimes use IK to first approximate the position of a limb target. It is also good to have on when playing with limb params further down tree (like subtly changing the collar without moving the hand). But it does TERRIBLE things to the rotation/bend/twist params of the hand! So, if I've used IK to help me establish a rough pose, I turn it off and fix the hand params. It'd be nice to use the strengths of IK/non-IK modes when posing key frames in an animation..... but, like I said above, Poser won't let me limit the number of frames that gets affected whenever I change modes.... so things REALLY screw up! When using IK continuously in an animation, I find limb angles "jumping" from frame to frame. So even staying in the IK mode, which would SIGNIFICANTLY HELP TO PREVENT SKATING (if it worked properly), isn't terribly helpful. I've e-mailed Curious a while back now, with thoughts of what might be looked at to fix the problem (including increasing the precision of the IK algorithms). But they've never offered me the courtesy of a reply. (ARE YOU LISTENING, CURIOUS LABS, THE FOLKS WHO CLAIM POSER IS A SUPERB ANIMATION PACKAGE?)