diff -up mate-panel-2.31.90/mate-panel/panel-applet-frame.c.applet-error mate-panel-2.31.90/mate-panel/mate-panel-applet-frame.c
--- mate-panel-2.31.90/mate-panel/mate-panel-applet-frame.c.applet-error	2010-06-22 19:00:28.000000000 -0400
+++ mate-panel-2.31.90/mate-panel/mate-panel-applet-frame.c	2010-09-10 13:17:37.507233002 -0400
@@ -513,6 +513,21 @@ _panel_applet_frame_set_iid (PanelApplet
 	frame->priv->iid = g_strdup (iid);
 }
 
+static gboolean
+in_default_panel_config (const gchar *id)
+{
+        gchar *dir;
+        gboolean result;
+
+        dir = g_strconcat (PANEL_DEFAULTS_DIR, "/applets/", id, NULL);
+        result = mateconf_client_dir_exists (panel_mateconf_get_client (),
+                                          dir, 
+                                          NULL);
+        g_free (dir);
+
+        return result;
+}
+
 void
 _mate_panel_applet_frame_activated (MatePanelAppletFrame           *frame,
 			       MatePanelAppletFrameActivating *frame_act,
@@ -527,9 +542,11 @@ mate_panel_applet_frame_activated (PanelAppl
 			   frame->priv->iid, error->message);
 		g_error_free (error);
 
-		mate_panel_applet_frame_loading_failed (frame->priv->iid,
-						   frame_act->panel,
-						   frame_act->id);
+                if (!in_default_panel_config (frame_act->id)) {
+		        mate_panel_applet_frame_loading_failed (frame->priv->iid,
+						           frame_act->panel,
+						           frame_act->id);
+                }
 		mate_panel_applet_frame_activating_free (frame_act);
 		gtk_widget_destroy (GTK_WIDGET (frame));