I have had my first Mac for about a month now (iMac 24" 2.8, 4GB). I have started noticing in the last few days, a somewhat frequently appearing "spinning disk" (don't know what it is called, but in Windows-land they call it "clocking"). In any case, I never saw this when I only had 2GB of RAM. Nor after I upgraded to 4GB which was a couple weeks ago. But lately this is occuring enough to be a bit annoying. Any suggestions?