AS3 Workers in Air HTML Environment?

Hi,

I've been doing some work trying to get an AS3 worker running from the webkit enviroment and am having a really strange problem.  As soon as I start the worker, the worker starts chewing through all available CPU.  No messages are being passed, it has just been started.

Here is an example of the worker:

package DDX
{
     import flash.events.Event;
     import flash.system.MessageChannel;
     import flash.system.Worker;
     
     public class Worker
     {
          private var mainToBack:MessageChannel;
          private var backToMain:MessageChannel;
          
          public function Worker()
          {
               var current:flash.system.Worker = flash.system.Worker.current;
               
               mainToBack = current.getSharedProperty("mainToBack");
               backToMain = current.getSharedProperty("backToMain");
               
               mainToBack.addEventListener(Event.CHANNEL_MESSAGE, onMainToBack);
          }
          
          private function onMainToBack(event:Event):void
          {
               if (mainToBack.messageAvailable) {
                    var msg:* = mainToBack.receive();
                    
                    if (msg == "SOLVE") {
                         backToMain.send("SOLVED");
                    }
               }
          }
     }
}

And here is how I set it up in JavaScript:

var workerLoader = new air.URLLoader(),
    mainToBack,
    backToMain,
    bgWorker,
    workerBytes;

workerLoader.dataFormat = air.URLLoaderDataFormat.BINARY;
workerLoader.addEventListener(air.Event.COMPLETE, function(event) {
    workerBytes = event.target.data;
    bgWorker = air.WorkerDomain.current.createWorker(workerBytes);

    mainToBack = air.Worker.current.createMessageChannel(bgWorker);
    backToMain  = bgWorker.createMessageChannel(air.Worker.current);

    backToMain.addEventListener(air.Event.CHANNEL_MESSAGE, function() {
        if (backToMain.messageAvailable) {
            var msg = backToMain.receive();
            console.log('RECEIVED ' + msg);
        }
    }, false, 0, true);

    bgWorker.setSharedProperty("backToMain", backToMain);
    bgWorker.setSharedProperty("mainToBack", mainToBack);

    // listen for worker state changes to know when the worker is running
    bgWorker.addEventListener(air.Event.WORKER_STATE, function(e) {console.trace(e)});
});
workerLoader.load(new air.URLRequest("assets/flash/DDXWorker2.swf"));

As soon as I start the worker, CPU starts being eaten up entierly:

bgWorker.start();

No messages being sent via the channel, just the worker started.

Any ideas?

Thanks,

Mike