ive had my af100 for quite a while now, and ive kinda always had an issue with the function knob/switch thing. Whenever i try and do variable kelvin for white balance, the switch wont respond when i try to lower the K. I sometimes have to push different angles or up then down, but sometimes just dosent work at all. Anyone else experience this or is it just a minor issue with mine? Ive got a second body that my roommate owns and I have used his when mine goes out on other jobs, and that one seems to be fine. Just the first body that i got seems to be kinda picky.