[away3d] [broomstick] problem with lights in latest revision

[sven]

I found a weird bug that prevents my code from working since I switched from 
the broomstick download zip-version from last week to the latest svn 
revision: when I now add a light to a material of an loaded object, the 
object won't get rendered any more. I have no idea what could cause this 
because I had no problems with adding lights to the same objects with the 
broomstick version from last week. 
I broke it down to the following little testcode, the obj-file can be 
downloaded here:
http://die-beiden.com/_temp/broomstick/maptest2.obj

    public class loadTest extends Sprite
    {
        private var _view:View3D;
        private var _scene:Scene3D;
        private var _light:PointLight;
        private var mat:ColorMaterial;
        private var mat2:ColorMaterial;
        private var terrain:ObjectContainer3D;
        
        [Embed(source="maptest2.obj", 
mimeType="application/octet-stream")]        
        private var Terrain : Class;
        
        public function loadTest() 
        {
            addEventListener(Event.ADDED_TO_STAGE, doStart);
            
        }
        private function doStart(e:Event):void
        {
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.align = StageAlign.TOP_LEFT;
            _view = new View3D();            
            addChild(_view);            
            
            _light = new PointLight();
            _view.scene.addChild(_light);
            mat = new ColorMaterial(0x0000ff);
            mat2 = new ColorMaterial(0x00ff00);

            //mat.lights = [_light]; //<== when uncommented, the blue 
terrain won't get rendered

            terrain = new ObjectContainer3D();
            
ResourceManager.instance.addEventListener(ResourceEvent.RESOURCE_RETRIEVED, 
onThingsLoaded);
            terrain = 
ObjectContainer3D(ResourceManager.instance.parseData(new Terrain(), 
"terrain", true));
            
            var plane:Plane = new Plane(mat2, 300, 300);
            plane.x = 200;
            
            _view.scene.addChild(terrain);
            _view.scene.addChild(plane);
            
            _view.camera.y = 100;
            _view.camera.lookAt(plane.position);
            addEventListener(Event.ENTER_FRAME, onEnterFrame);            
        }
        private function onThingsLoaded(e:ResourceEvent):void
        {            
            var mesh:Mesh;            
            for (var i : int = 0; i < 
ObjectContainer3D(e.resource).numChildren; ++i) {
                mesh = Mesh(ObjectContainer3D(e.resource).getChildAt(i));
                mesh.geometry.scale(8);
                mesh.material = mat;
            }
        }
        private function onEnterFrame(e:Event):void
        {
            _view.render();
        }
    }


Any help would be appreciated :)

cheers,
sven