My core 2 duo 17" imac's screen dims after a minute of inactivity (say, when I'm reading or watching anything on the computer!). I do not have the energy saver settings on (ie, dim screen before monitor shutoff), and cannot understand why this happens! It is getting very annoying. Any thoughts? Also, are there any commands available yet to turn off the monitor when it isn't in use - I want to be able to get a blank screen and the backlight to turn off with a touch of a button. Is this possible? (I know of some applescripts that enable you to do this in one minute...but why is it not instant? Perhaps Apple's devious plan to rob users of their screen's lifespan?!) Coming from 10+ years of using Windows machines, I have one further question - why do the "home" and "end" keys not go to the beginning or end of a line of text when pressed? Is there any way to enable this? The only application I've been able to do this in so far is Word.