I'm sure this question has been asked a lot but all the threads I dug up were for earlier iMacs with the 4800 series cards. I just bought a brand new 27" i7 with the 5750 1GB graphics card. Have buyers been noticing the same screen flicker on these new models? If so, could anyone please point me to a thread related to this specific model? Any known fixes or patches? I have had the machine for 1 day and thought I just noticed flickering while transferring files from an external hard drive. I'm now playing a movie to see if maybe it's a heat issue. Regardless, I'd love to know if this flickering business was supposedly fixed in the latest iMac models. Thanks!