ik target jumping

So I JUST watched a tutorial video about setting up an ik with a target, and it works to some some degree, but if I move the elbow target around the elbow doesn’t actually point to it until I move the ik itself. Is this a bug?

Also, the joint won’t bend at certain angles.

okay I figured it out (For anyone out there that might have cared?) It was because I didn’t set the target for the Ik, so just manipulating the ik directly didn’t work properly.

Would you mind sharing a link to this video, please?

http://vimeo.com/13978208

That should take you to it. this site also has some good stuff:

Good luck!