I have a mid-2008 black Macbook (right before the unibody refresh) and lately the trackpad button is very touchy. Over time I would notice that it was becoming less and less "clicky," but still worked just fine. But in the past week or so it doesn't click at and, and in fact s so sensitive that hardly any pressure at all is required to register a click. In fact, so much a resting a finger on top of the button will activate it. I looked around and found the "origami fix," but that seemed to have the opposite effect. Itstead of requiring extra padding under the button, it's like I need less. If I remove the battery completely, the button reacts and clicks like it should. My battery doesn't seem like it's swelled or anything, but is it possible that it's expanded in the past year and a half? Is there anything I can do about this problem, short of replacing the whole top cover?