I recently purchased a used last-generation iBook on Ebay and immediately uncovered what I believe is a significant problem. While using the tracking pad and simply scrolling down a menu or passing over icons, it will be as if I've clicked on the mouse button and I'm thrown into unwanted pages. Further, I can tap on the tracking pad and it will likewise act as a mouse button and I can access anything I would ordinarily use the mouse button for. Clearly, this is something I'm not happy about. Before I go yelling and screaming back to the seller and make threats, is there something I can do as far as a fix on this? Nothing in preferences seems to be of any help, including "Ignore accidental tracking pad input." Thoughts???