I've had this macbook for 6 months or so, and it has been perfect. Its the standard one. However, yesterday, I have an problem with the hotkeys being rearranged, (eg, before, to get the function of Dashboard, it was F4, now its F12). I cannot set to default hot keys, because it claims that the messed up ones are the defaults. While, annoyingly, Apple Speech is prominately place as On. It reads out the name of any program I click, whatever I type in. How do I sort these problems out, and how can I avoid them happening again? Thanks, Pete.