Bombinating “little” iMac?

Andi has just drove by to take a closer look (or better “hear”) on my iMac. Last friday he just bough the 2,4GHz 24″ iMac that has been released lately and today he took it back to Gravis, where he bought it from, because it was humming pretty loud and unnaturally. He got to pick another, took it back home, turned it on and again the humming was there. Now he wanted to know, whether mine (from the first charge of aluminum iMac-models) was as annoyingly loud as his, before he also returns the second one.

Is it possible, that Apple’s production quality on the newer iMacs really decreased and got pretty frowzy? As I’ve posted some time ago, he had also ordered two new 2GHz MacBooks then ago. On the first MacBook he got the Superdrive was broken and on the second one the case’s quality was pretty meh - every time you put your hands on the right hand rest you could hear a small “click” noise. It seemed like the material was so thin at that part that it curved down the to interior hardware and by that produced a “click”-sound.

Tomorrow I’m going to take a closer look at his new iMac until he has to (again) return it to his dealer and get a new one – which probably has the same problems..? Did anyone experience this sort or similar problems with his newly brought Apple hardware? Please feel free to comment and post problems, I would really like to know whether it’s bad luck or a general problem.