Scrambled screen

Folks,
I'm loving my new iMac Core Duo, but I'm having some occasional funkiness with the screen.
When I first took the computer out of the box, set it up and started it, the display was "scrambled", meaning it look like a mesh of tiny boxes. I nearly freaked out, but rebooted and everything was fine. This morning, my wife woke the machine out of sleep to be confronted with the same screen. Again, a reboot solved the problem.
Any thoughts?

Hi,
Could you elaborate on what you meant by "scrambled"? I just picked up a 20" iMac intel core duo last Friday. And unlike iMac G5 with iSight that I returned to get the new iMac, the displays on the screen were not really crisp. It looked as if it was out of focus.
I ran pixel tests and I didn't see any bad pixels. I thought I had a bad LCD and was going to return it. But after clean install as a preparation for the return, the display seems to be fine. Or at least at the same level as my previous 20" iMac G5. So I decided to keep the iMac for now but I will be quite keen on experience from others.
My new iMac has the stock VRAM option (128MB).
Thanks.
20" iMac Core Duo   Mac OS X (10.4.4)  

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