--- libzeitgeist-0.3.6/src/zeitgeist-log.c.debug	2011-03-07 23:25:43.000000000 +0900
+++ libzeitgeist-0.3.6/src/zeitgeist-log.c	2011-03-23 01:32:50.000000000 +0900
@@ -1048,7 +1048,7 @@
   self = ZEITGEIST_LOG (user_data);
   priv = ZEITGEIST_LOG_GET_PRIVATE (self);
 
-  g_object_unref (priv->log);
+  if (priv->log) g_object_unref (priv->log);
   priv->log = NULL;
 
   g_object_notify (G_OBJECT (self), "connected");