diff -r b1278888d9a9 -r 2354fdb91ac4 GUI/SensorNode.cs
--- a/GUI/SensorNode.cs	Sat May 22 15:51:59 2010 +0000
+++ b/GUI/SensorNode.cs	Mon May 24 15:27:46 2010 +0000
@@ -73,7 +73,7 @@
 
       bool hidden = Config.Get(new Identifier(sensor.Identifier, 
         "hidden").ToString(), sensor.IsDefaultHidden);
-      IsVisible = !hidden;
+      base.IsVisible = !hidden;
     }
 
     public override string Text {