Index: /trunk/src/org/openstreetmap/josm/gui/dialogs/properties/PropertiesDialog.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/dialogs/properties/PropertiesDialog.java	(revision 5270)
+++ /trunk/src/org/openstreetmap/josm/gui/dialogs/properties/PropertiesDialog.java	(revision 5271)
@@ -157,4 +157,6 @@
                 if (row > -1) {
                     propertyEdit(row);
+                } else {
+                    add();
                 }
             } else if (e.getSource() == membershipTable) {