If I'm moving the settings window, for example, I click and hold at the top where it says 'System Preference' in the settings window and drag the window around in circles at which point the window stops following my mouse maybe after 1/2 a second. Why is this? A related problem, I'm trying to scroll by clicking on the blue scroll bar on the right (on FireFox). I click and hold on the blue scroll bar and drag it up and down a few times and yet the scorll bar does not follow my mouse after about the 1/2 second point. I've tried this in google chrome and safari with the same result. *I am only using the trackpad on the mbp 2009, not an external mouse. Any help?