Just got my new, and very first iMac on Saturday. iMac 27", Dual Core 3.06gig, and so far, except for a few software glitches, probably caused by an inexperienced Apple user, everything working A-OK. No yellow screen or noise issues. Im imprressed with this computer. Getting tons of harassment from my PC friends, but my skin is thick enough to deal with that. Starting my Apple One On One lessons on Monday eve, but in the meantime, Im up an running.