I just got an e-mail from Art Henderson at mathews and he said that it could be from excessive wax build up or a little string and cable stretch has caused my brace height to be slightly off. I have a winners choice string and cables on it and my measurements are exactly 6 5/8 brace and 35 3/4 axle to axle, which is what he told me to check. So that is not the problem. He said I could put a piece of moleskin on it, but I thought it might alter the tune a little like mentioned in a previous post, and that it won' t stick. I just e-mailed them again, so I am stil trying to get an answer I am happy with. I' ll let you all know. Bhunter32.