I had clunking for quite a while.
Fairly often early on (up to about 8 months), much less so later (about 10 months and beyond). To me it meant that your smaller muscles are not quite there yet. At four months, they shouldn't be, I would think.
My worst clunking was having just gotten up, brushing my teeth or shaving in front of the mirror. I don't know if it was because of the tightness of just getting up, because the bathroom is quieter and you just notice it more, or because shaving causes clunking
![Shocked :o](http://surfacehippy.info/hiptalk/Smileys/default/shocked.gif)
So maybe you need to do some things to help them strengthen.
Leg lifts were a constant part of my therapy to all points of the compass (front, side, back, inside). I used a band around a chair leg, slipped one ankle in and used the band as resistance. Only until moderate resistance. Then I would repeat 15 times, 3 sets.
I also got a slide board, which simulates skating. Scary at first, since you are sliding across about 7 ft, wearing the goofiest booties around your sneakers. It does strengthen the muscles that may not be exercised by the forward motion of walking or even running.
I think juggling also helped me. It's fun to learn and causes that shifting of the body to keep balls in the air. I also later did soccer juggling, but that's a different animal altogether.
Balacing on one leg, first on the floor, then on a throw pillow also gets those muscles involved without too much big muscle intervention.
I don't think you should avoid clunking, it's just a fact of hippy life, just do the things to strengthen those muscles. It will go anyways, but we can help it along.