diff -up src/applet.c.throttle src/applet.c
--- src/applet.c.throttle	2007-09-16 23:28:17.000000000 -0400
+++ src/applet.c	2007-09-16 23:29:07.000000000 -0400
@@ -2347,18 +2347,16 @@ maybe_lock_screen (FusaAppletData *adata
 	  g_error_free (err);
 	}
 
-      if (use_gscreensaver)
-	args[1] = "--throttle";
-      else
-	args[1] = "-throttle";
+      args[1] = "-throttle";
 
-      if (!gdk_spawn_on_screen (screen, g_get_home_dir (), args, NULL,
+      if (use_gscreensaver ||
+          !gdk_spawn_on_screen (screen, g_get_home_dir (), args, NULL,
 				(G_SPAWN_STDERR_TO_DEV_NULL |
 				 G_SPAWN_STDOUT_TO_DEV_NULL),
 				NULL, NULL, NULL, &err))
 	{
 	  g_warning (_("Can't temporarily set screensaver to blank screen: %s"),
-		     err->message);
+		     err ? err->message : "");
 	  g_error_free (err);
 	}