Index: applications/editors/josm/plugins/validator/src/org/openstreetmap/josm/plugins/validator/ValidateAction.java
===================================================================
--- applications/editors/josm/plugins/validator/src/org/openstreetmap/josm/plugins/validator/ValidateAction.java	(revision 2798)
+++ applications/editors/josm/plugins/validator/src/org/openstreetmap/josm/plugins/validator/ValidateAction.java	(revision 2800)
@@ -57,5 +57,4 @@
         
 		plugin.errors = new ArrayList<TestError>();
-		plugin.validationDialog.setVisible(true);
 		
 		Collection<Test> tests = OSMValidatorPlugin.getTests(true);
@@ -97,5 +96,6 @@
 		tests = null;
 		
-		plugin.validationDialog.refresh(plugin.errors);
+		plugin.validationDialog.tree.setErrors(plugin.errors);
+        plugin.validationDialog.setVisible(true);
         Main.map.repaint();
         Main.ds.fireSelectionChanged(Main.ds.getSelected());