             return;
         
         _defaultRowHeight = bound(value, _minRowHeight, _maxRowHeight);
+        
+        // reset recent node.
+        recentNode = null;
     }
     
     //----------------------------------

    public function setTypicalCellHeight(columnIndex:int, value:Number):void
    {
        typicalCellHeights[columnIndex] = value;
    }
        
    /**

    private var recentNode:GridRowNode = null;
    
    private const typicalCellWidths:Array = new Array();
    private const typicalCellHeights:Array = new Array();
    private var isFirstTypicalCellHeight:Boolean = true;
    
    //--------------------------------------------------------------------------
    //
