Index: applications/editors/josm/plugins/roadsigns/src/org/openstreetmap/josm/plugins/roadsigns/RoadSignsPlugin.java
===================================================================
--- applications/editors/josm/plugins/roadsigns/src/org/openstreetmap/josm/plugins/roadsigns/RoadSignsPlugin.java	(revision 30940)
+++ applications/editors/josm/plugins/roadsigns/src/org/openstreetmap/josm/plugins/roadsigns/RoadSignsPlugin.java	(revision 30962)
@@ -72,4 +72,5 @@
         PropertiesDialog.pluginHook.add(btn);
         PropertiesDialog.pluginHook.setLayout(new FlowLayout(FlowLayout.CENTER, 0, 0));
+        PropertiesDialog.pluginHook.revalidate();
     }