Yeah, I also noticed this. Pity, because I am returning my iMac 24" today because of a bad case of the screen gradient issue, and I want to buy a new one - but not before they fix certain screen problems!
I'm in the process of figuring out what I want to get. Either the "Extreme" 2.8 iMac or a Mac Pro tower. I keep holding out in hopes of them putting an Nvidia video card in it.