Hello all ! 27th november 2009 -- FINALY !! My iMac 27" arrived. I rush to make it run and to update everything, and to get Vista 64 Ultimate running. FInally installing my games again ( WoW and AION ) and 3 hours later set to play. 1 hour -- Man everything is so nice.... 2nd hour -- My mac start to go crazy -- Flickering of the screen 2H15 later -- My Screen turns black for 1 second and comes back... So is this a heating problem ? Flackering after i played some hours ? Can i do something ? Is the first 27" serie not working properly ? Thanks for your feed backs and help.