Weight Mapping Question

Originally posted this in the mega thread, but after several days nobody seems to look at that thread, so, I’m getting this bug when moving the upperarm of my model.

http://filesmelt.com/dl/anim_bug.png

Not really many ideas how to fix it. I tried reducing the weight of the vertexes under the arm but no luck.
(Keep in mind I just learned the basics of weight mapping around five minutes ago).

http://filesmelt.com/dl/bug_weightmap.png

(This is Blender, in case you haven’t guessed).

Best recommendation - move the bone into a rotation and then keep fixing the blending until it looks alright.

Woot, I got it to work. Turns out the Clavicle bone’s weight was causing it.