I have a really strange problem with the animation view. I tried to animate an arm to move a little bit up so made a key frame went 20 keys forward, took the Y-Axis of the object and rotated it up and made again a key frame.
When I played the animation, the arm made some really strange movements, rotation wild around. I don't know what I've done false because I just changed the coordinates of the y-axis.
I've also made a picture so it's easier to understand what I mean: http://img585.imageshack.us/img585/7124/animationserror.png