             _mxmlContentType = MXML_CONTENT_TYPE_UNKNOWN;
             
         mxmlContentChanged = true;
+        maskChanged = true;
         invalidateProperties();
+        invalidateDisplayList();
     }
 
     /**


import flash.display.BlendMode;
import flash.display.DisplayObject;

import mx.components.baseClasses.GroupBase;
import mx.core.ILayoutElement;

	        if (currentSharedSprite)
	        	currentSharedSprite.invalid = false;
        }
        
        if (scaleGridChanged)
        {
        	scaleGridChanged = false;
        	
        	scale9Grid = new Rectangle(scaleGridLeft, 
        							   scaleGridTop,	
        							   scaleGridRight - scaleGridLeft, 
        							   scaleGridBottom - scaleGridTop);
        }
    }

    /**
