Having chased rf birdies, ground loop problems and feedback issues for over 30 years, I think it's interference between new graphics, MBA chassis and display input.  Could even be P.S., fan, Airport, light sensor, or iSight that is feeding harmonics to display input.  I seriously don't think it's the display on it's own.  Or for that matter, any one piece.  Just my cent and a half (not quite worth 2.)
	
		
			
		
		
	
				
			 
 
		 
 
		 
 
		 
 
		 tried to fix something that wasn't broken. Yes the internals are vastly different in rev B, but why can't the QC department spot this before it leaves the door?
 tried to fix something that wasn't broken. Yes the internals are vastly different in rev B, but why can't the QC department spot this before it leaves the door?