diff -Naur xfce4-panel-4.6.0/AUTHORS xfce4-panel-4.6.0.new/AUTHORS
--- xfce4-panel-4.6.0/AUTHORS	2009-01-13 08:35:39.000000000 +1100
+++ xfce4-panel-4.6.0.new/AUTHORS	2009-08-24 19:12:00.819684633 +1000
@@ -36,3 +36,4 @@
 Olivier Bolzer
 Bernhard Walle
 Michael Mosier
+Simon Naunton
diff -Naur xfce4-panel-4.6.0/libxfce4panel/xfce-panel-plugin-iface.c xfce4-panel-4.6.0.new/libxfce4panel/xfce-panel-plugin-iface.c
--- xfce4-panel-4.6.0/libxfce4panel/xfce-panel-plugin-iface.c	2009-01-13 08:35:29.000000000 +1100
+++ xfce4-panel-4.6.0.new/libxfce4panel/xfce-panel-plugin-iface.c	2009-08-24 19:17:33.961879194 +1000
@@ -42,6 +42,7 @@
     SAVE,
     ABOUT,
     CONFIGURE,
+    REMOVE,
     LAST_SIGNAL
 };
 
@@ -184,6 +185,21 @@
                           0);
 
         /**
+         * XfcePanelPlugin::remove-plugin
+         * @plugin      : a #XfcePanelPlugin widget
+         *
+         * Emitted when the plugin is about to be removed from the panel.
+         **/
+        xfce_panel_plugin_signals [REMOVE] =
+            g_signal_new (I_("remove-plugin"),
+                          G_TYPE_FROM_CLASS (klass),
+                          G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS,
+                          0, NULL, NULL,
+                          g_cclosure_marshal_VOID__VOID,
+                          G_TYPE_NONE,
+                          0);
+
+        /**
          * XfcePanelPlugin:name
          *
          * Untranslated plugin name. This identifies the plugin type and
@@ -639,6 +655,8 @@
 void
 _xfce_panel_plugin_remove (XfcePanelPlugin *plugin)
 {
+    g_signal_emit (G_OBJECT (plugin), xfce_panel_plugin_signals[REMOVE], 0);
+
     XFCE_PANEL_PLUGIN_GET_INTERFACE (plugin)->remove (plugin);
 }