 		override public function setChildIndex (child:INode, index:uint):void
 		{
 			super.setChildIndex(child, index);
-			invalidateScene();
+			_isInvalidated = true;
 		}
 		
 		/**

		///////////////////////////////////////////////////////////////////////////////
		
		/**
		 * @inheritDoc
		 */
		override public function addChildAt (child:INode, index:uint):void

		private var _isInvalidated:Boolean = false;
		
		/**
		 * Flag indicating if the scene is invalidated.  If true, validation will occur during the next render pass.
		 */
		public function get isInvalidated ():Boolean
		{
