MAJOR discovery (for me anyhow) for us animators. The wayward spline fix is here. If you want to convert any or all frames to Linear Interpolation (to rid of unwanted overshoots between keys) ,Here's a very simple way: 1)In the Animation Pallette drag a box over the offending frames & Body part for the messed up in-between frames 2)Click on the Linear Interpolation gadget in the upper right of the Anim Pallette window (see image). Thats it! All the selected frames convert to Linear Interpolation. This ends hours & days of my struggles fixing movement of frames that are suppose to be "Inbetween" keyframes, but are anything but. I never thought of this, someone else may have I'm sure. I spent so many hours searching through each MT dial in the Graph Window, limb by limb, MT dial by MT dial(Bend,Twist, XRot etc), to convert to Linear Interpolation or to see what went wacko on me. Just select/drag a box around (in the Animation Pallette Window)the offending frames for the wacky keyframes/inbetweens, for the bodypart, & hit the Linear button.

You can also use the graph. I have found that it gives me better control over individual parts/tweaks. Good Luck, Visque

You can also expand each body part in the animation pallette and apply the type of interpolation you need for each parameter. Can really help if you need to keep some part from moving during another action. Each parameter can have different and multiple interpolations. Happy Animating EdW

Point taken. I'm only speaking in general. Wasted too much time. Think about how many graphs there. Every dial for each separate body part, between every keyframe. Frames are screaming past at 30 fps. You never know what went wacky. Could have been up the IK chain, maybe down. Plus there could be 1000 keyframes to keep track of, & you looked in the wrong frame section. Been there. If you're doing any length of animation, you don't need to be looking for a needle in a haystack everytime you turn around. Just going where I told ya, & behave yourself. I never noticed Linear Interpolation to be that abrupt. Much easier to fix than tracking down loose splines. But splines are certainly best if they could be kept on a tighter leash.