[flexcoders] Browser size keeps growing when I load and image

[doepositive]

I fooling around with flex to learn more and I ran into a problem. 
I'm trying to schedule a refresh of an image every 30 sec (or so), I 
I leave the browser open the IEXPLORER size grows with every load. I 
tried cachePolicy="off" 

Here is an example of what I'm doing

import flash.display.Sprite;
import flash.events.Event;
import flash.events.TimerEvent;
import flash.utils.Timer;

private function refreshCharts():void {
        image1.cachePolicy="off"
        image1.load("http:\/\/www.someSite.com/someImgage.gif");
        } 
private function ShortTimer():void  
        {
            
            // creates a new five-second Timer
            var minuteTimer:Timer = new Timer(1000, 150);
            
            // designates listeners for the interval event and the 
completion event
            minuteTimer.addEventListener(TimerEvent.TIMER, onTick);
            minuteTimer.addEventListener(TimerEvent.TIMER_COMPLETE, 
onTimerComplete);
            
            // starts the timer ticking
            minuteTimer.start();
        }

        private function onTick(evt:TimerEvent):void 
        {
            if(evt.target.currentCount == 150){
                
                ShortTimer();
            }
        }
        public function onTimerComplete(evt:TimerEvent):void
                {
                        refreshCharts();//
                        ShortTimer();
                        
                }