diff -Nur metacity-2.18.2/src/session.c metacity-2.18.2.new/src/session.c
--- metacity-2.18.2/src/session.c	2007-04-08 20:46:17.000000000 +0200
+++ metacity-2.18.2.new/src/session.c	2007-04-26 00:18:24.000000000 +0200
@@ -1824,8 +1824,6 @@
 
       display_iter = display_iter->next;
     }
-  /* don't need to free displays */
-  displays = NULL;
 
   if (lame == NULL)
     {
@@ -1839,6 +1837,9 @@
   timestamp = meta_display_get_current_time_roundtrip (displays->data);  
   sprintf (timestampbuf, "%u", timestamp);
 
+  /* don't need to free displays */
+  displays = NULL;
+
   len = g_slist_length (lame);
   len *= 2; /* titles and also classes */
   len += 2; /* --timestamp flag and actual timestamp */