             perfUtil.markTime("validateSize().start");
         }
 
-        if (FlexVersion.compatibilityVersion >= FlexVersion.VERSION_4_5)
-            validateEstimatedSizes(invalidateSizeQueue.clone());
-        
         var obj:ILayoutManagerClient = ILayoutManagerClient(invalidateSizeQueue.removeLargest());
         while (obj)
         {

import mx.core.UIComponent;
import mx.core.UIComponentGlobals;
import mx.core.mx_internal;
import mx.core.FlexVersion;
import mx.events.DynamicEvent;
import mx.events.FlexEvent;
import mx.managers.layoutClasses.PriorityQueue;

                invalidatePropertiesFlag = false;
                invalidateClientPropertiesFlag = false;
            }
            
            // trace("--- LayoutManager: validateSize --->");

            obj = ILayoutManagerClient(invalidateSizeQueue.removeLargestChild(target));
