What that basically means is that there is some evidence of trauma or wear and tear on one of the rotator cuff tendons ... but like John says, if the problem is a result of a type III acromion, really only surgery will keep you from continually irritating it and eventually wearing through it. The best thing to do right now is to rest it, keep it pain-free, and let the inflammation settle down. If you feel you must do something, then do pendulum exercises.
JP, bummer! That distal clavicle resection is a b!t*h! You must have had some massive AC joint pain, eh? No wonder your shoulders are a mess ...
