--- a/src/gtkplugin.c	Thu Mar 02 16:16:13 2006 +0000
+++ b/src/gtkplugin.c	Thu Mar 02 19:00:55 2006 +0000
@@ -294,7 +294,7 @@
 			                    _("Multiple plugins will be unloaded."),
 			                    tmp->str, 0, cb_data, 2,
 			                    _("Unload Plugins"), G_CALLBACK(plugin_unload_confirm_cb),
-			                    _("Cancel"), NULL);
+			                    _("Cancel"), g_free);
 			g_string_free(tmp, TRUE);
 		}
 		else