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

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

            {
                for (i = temp; i < _columnCount; i++)
                    _columnWidths[i] = NaN;
                
                if (_columnCount == 0)
                {
                    clearTypicalCellWidthsAndHeights();
                }
                else
                {
                    typicalCellWidths.length = _columnCount;
                    typicalCellHeights.length = _columnCount;
                }

            }
        }
    }
