/*
Use if your objects position is based on stage.stageWidth and stage.stageHeight.
When refreshed it traces 0 for stageWidth and stageHeight
*/
function startApp():void {
	// make it call an function on resize
	stage.addEventListener(Event.RESIZE, resizeHandler);
	// call that resizeHandler again (for browsers like IE 6)
	resizeHandler();
}

function resizeHandler(e:Event = null):void {
	// check if the Height and Width is bigger than zero and act accordingly.
	if ( stage.stageHeight > 0 && stage.stageWidth  > 0 ) {
		// safe area. Do normal resize
	}
}

function startApp():void {
	// make it call an function on resize
	stage.addEventListener(Event.RESIZE, resizeHandler);
	// call that resizeHandler again (for browsers like IE 6)
	resizeHandler();
}

function resizeHandler(e:Event = null):void {
	// check if the Height and Width is bigger than zero and act accordingly.
	if ( stage.stageHeight > 0 && stage.stageWidth  > 0 ) {
		// safe zone. Add code here.
	}
}

Stage Resize Refresh IE 6 Bug Fix

resize, ie6

ActionScript 3