Get real content size

if you need the real size of the content in a display object with a scroll rect applied you can use pixel bound combined with the tranformation matrix. The following example returns the unscaled values. I just needed it once, but this was the only way it worked for me:

 
public static function getContentBounds(displayObject:DisplayObject):Rectangle{
 var bounds:Rectangle, transform:Transform, toGlobalMatrix:Matrix, currentMatrix:Matrix;
 transform = displayObject.transform;
 currentMatrix = transform.matrix;
 toGlobalMatrix = transform.concatenatedMatrix;
 toGlobalMatrix.invert();
 transform.matrix = toGlobalMatrix;
 bounds = transform.pixelBounds.clone();
 transform.matrix = currentMatrix;
 return bounds;
}