Yup, did a search under "sleep," couldn't find anything... If I don't touch my running iMac (OS 10.5.7) for five minutes or so, it reverts from a running state to some kind of sleep state--desktop replaced by screen saver, all running programs shut down, document I'm working on (using NeoOffice) closes. Computer is brand-new, system preferences/energy saver settings are: both sliders set at "never," no boxes checked, all are off. Damn thing is doing it on its own. Is there anything else I can reset, or is this a gitch?