I thought the yellow discolouration issue was the only thing I had to worry about. Now there are complaints about dust and other bits being sucked up behind the screen panel through the fan, which then necessitates the manual removal of the screen using suction cups (ugh). Is this really and truly an inevitability or is it more akin to the yellow discolouration? Folks in the other thread are going so far as to cancel their order for an iMac because of this issue. Would you say that is a reasonable or precipitate move?