Attached Link: http://www.philc.net/animation1.htm

when ya said "walking like a clown", I guessed a bow-legged silly walk, which might be fixed (assuming IK on) by raising the hip. however, if it's just the shins bending forwards, raising the hip won't fix that, unless ya try the same animation without leg stretch morph, and the shins don't bend forward (IK on).