     protected function getContext (url :String) :LoaderContext
     {
         // We allow content to share but not overwrite our classes
-        return new LoaderContext(true, 
-            new ApplicationDomain(ApplicationDomain.currentDomain),
-            SecurityDomain.currentDomain);
+//        return new LoaderContext(true, 
+//            new ApplicationDomain(ApplicationDomain.currentDomain),
+//            SecurityDomain.currentDomain);
+
+        // share nothing, trust nothing
+        return new LoaderContext(false, null, null);
     }
 
     /**

        _w = 0;
        _h = 0;
        _media = null;
        width = NaN;
        height = NaN;
    }

    /**

     */
    protected function updateContentDimensions (ww :int, hh :int) :void
    {
        // update our saved size, and possibly notify our container
        if (_w != ww || _h != hh) {
            _w = ww;
