Well, exactly on the tin. Sometimes when i load up sfm and start animating, its all fine, fluid and decent. Other times i'll load up sfm and its just completely robotic frame to frame, theres still tweening but its very linear. I've kinda found a way around the robotic movement by moving different bones at different times, then again, sometimes it just becomes more robotic even though my animation style has not changed through out the 20-25 keyframes i put down.