         setColumnCount(visibleColumns);  
         setIndexInView(firstColInView, lastColInView);
         layoutTarget.setContentSize(maxX, maxY);      	      
-        updateScrollRect(unscaledWidth, unscaledHeight);
     }
 
 

     *  @see lastIndexInView
     *  @see horizontalScrollPosition
     */
    override public function horizontalScrollPositionDelta(unit:uint):Number
    {
        var g:GroupBase = target;
        if (!g)

import flash.ui.Keyboard;

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

import mx.containers.utilityClasses.Flex;
import mx.events.PropertyChangeEvent;
