Index: trunk/src/org/openstreetmap/josm/gui/dialogs/validator/ValidatorTreePanel.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/dialogs/validator/ValidatorTreePanel.java	(revision 11302)
+++ trunk/src/org/openstreetmap/josm/gui/dialogs/validator/ValidatorTreePanel.java	(revision 11303)
@@ -33,4 +33,5 @@
 import org.openstreetmap.josm.data.osm.event.DataChangedEvent;
 import org.openstreetmap.josm.data.osm.event.DataSetListener;
+import org.openstreetmap.josm.data.osm.event.DatasetEventManager;
 import org.openstreetmap.josm.data.osm.event.NodeMovedEvent;
 import org.openstreetmap.josm.data.osm.event.PrimitivesAddedEvent;
@@ -105,8 +106,5 @@
             }
         }
-        DataSet ds = Main.getLayerManager().getEditDataSet();
-        if (ds != null) {
-            ds.addDataSetListener(this);
-        }
+        DatasetEventManager.getInstance().addDatasetListener(this, DatasetEventManager.FireMode.IN_EDT);
     }