My Macbook (See sig for model, running OS X 10.6.4) is starting to have problems with keeping track of my touches. While I'm dragging something with one finger pressed down (physically clicking the trackpad) the computer keeps losing my touch. It stops dragging but the mouse continues to move. I don't have AppleCare, and the computer is obviously out of warranty. Is there something I can do without going to the retail store to fix this issue? I regularly work with dragging text and highlighting things in Pages, and this trackpad problem has really been getting to me. Thanks.