Source of the patch: http://cgit.freedesktop.org/xdg/xdg-utils/commit/?id=7465b22a95e9a28e3f4960e6ea40a4abeca1c2e9
--- scripts/xdg-screensaver	2007-06-24 21:58:06.000000000 +0200
+++ scripts/xdg-screensaver	2012-05-21 12:51:51.108252420 +0200
@@ -608,7 +608,7 @@
   fi
   $MV "$tmpfile" "$screensaver_file"
   unlockfile
-  (while [ -f "$screensaver_file" ]; do $*; sleep 59; done) > /dev/null 2> /dev/null &
+  (while [ -f "$screensaver_file" ]; do $*; sleep 50; done) > /dev/null 2> /dev/null &
 }
 
 screensaver_gnome()