//Finally came around to rewrite this: http://pastebin.com/tvnz57eQ
//fixing _FIT of near-rectangular pictures & _FILL-behaviour (filling on both axis)
function fitToScreen(mc:MovieClip) {	
	mc._yscale = mc._xscale = 100;
	var maxHeight:Number = Stage.height-25;	
	if(_scalingStrategy == _FIT){
		var getWidthRatio:Number = mc._width / mc._height;
		var getHeightRatio:Number = mc._height / mc._width;			
		if(Stage.width > maxHeight){
			mc._height = maxHeight;
			mc._width = Math.round(maxHeight*getWidthRatio);
		}else{
			mc._width = Stage.width;
			mc._height = Math.round(Stage.width*getHeightRatio);
		}	
	}else if(_scalingStrategy == _FILL){
		mc._width = Stage.width;		
		mc._yscale = mc._xscale;				
		if(mc._height < maxHeight){
			mc._height = maxHeight;
			mc._xscale = mc._yscale;
		}
	}
	mc._x = Stage.width*0.5 - mc._width*0.5;
	mc._y = maxHeight*0.5 - mc._height*0.5;
}