diff -urN main/libvo/x11_common.c main_noxsaver_error/libvo/x11_common.c
--- main/libvo/x11_common.c	2005-11-10 16:02:04.953406088 +0100
+++ main_noxsaver_error/libvo/x11_common.c	2005-11-18 19:06:21.679145968 +0100
@@ -1572,6 +1572,8 @@
     unsigned int time = GetTimerMS();
     XEvent ev;
 
+    if (mDisplay)
+        xs_windowid = find_xscreensaver_window(mDisplay);
     if (mDisplay && xs_windowid &&
         ((time - time_last) > 30000 || (time - time_last) < 0))
     {