Hey, i just hv my imac 27" for two days, it is making a weird noise. It is not a continuous noise, it is like the sound of a popping bubbles in a water boiler, it happens randomly, usually 1 to 2 seconds, but it usually happens when i tried to click into something, or tying on the keyboard. i hv transferred my old data from my macbook, it wont affect it right. Although it is a minor problem, do u guys hv the same problem, is it the sound of the hard disc??