DrawGizmo attribute: GizmoType arg with incompatible flag values

Hello there,

I try to use the `DrawGizmo` attribute to draw custom gizmos for my personal Unity editor tool.

The documentation about DrawGizmo is a bit sparse: I couldn't make the second DrawGizmo prototype work (`static function DrawGizmo (gizmo : GizmoType, drawnGizmoType : Type) : DrawGizmo`), so I'm using the first version of DrawGizmo but I've encountered some troubles about the values of the GizmoType argument.

In the C# example below, I've specifed the gizmo draw callback to be called when a Light game object is selected... but it appears to be executed whatever the object is selected or not! The GizmoType arg have sometimes all its flags enabled (`Active|NotSelected|Selected|SelectedOrChild`): how a game object can be active, selected and not selected at the same time?

 [DrawGizmo( GizmoType.Selected )]
 private static void RenderCustomLightGizmo( Light a_rLight, GizmoType a_eGizmoType )
 {
     Gizmos.DrawSphere( a_rLight.transform.position, 3.0f );
 
     if( ( a_eGizmoType & GizmoType.NotSelected ) != 0 )
     {
         Handles.Label( a_rLight.transform.position,
             a_rLight.name + " is selected but GizmoType says it is not. This message should not appear." );
     }
 }

Is it an Unity bug or am I doing/understanding something wrong?

Thanks.

PS: I was forgetting, I'm using Unity 3.5.7 on OSX 10.8.2