Just got my brand-new 24-inch iMac yesterday, unpacked it and hooked it all up last night (2.93 Ghz, Nvidia120 card). First off, absolutely beautiful computer. But... I'm already noticing a loud "pop" from the speakers on occasion. In doing a little research, I've seen where others have had this problem, but mostly with external speakers. Mine is with the built-in speakers. Seems to happen when I open a movie or sound file --- and only when one hasn't been opened in the last few minutes. I get a fairly loud "pop" upon opening the file, then everything's fine. If I immediately open another movie or audio file, I don't get a repeat of the pop, but if I wait, say, 5 minutes before opening another movie or audio file, I get the pop again. Is this a common problem? Am I gonna have to box this sucker back up and take it in? This is brand-new out of the box --- no peripherals hooked up (other than cable modem) and no software installed that didn't come on it.