diff -u libnotify-0.4.5/debian/changelog libnotify-0.4.5/debian/changelog
--- libnotify-0.4.5/debian/changelog
+++ libnotify-0.4.5/debian/changelog
@@ -1,3 +1,10 @@
+libnotify (0.4.5-1ubuntu4) lucid; urgency=low
+
+  * debian/patches/04_assertion-on-exit.patch: Fix an assertion when a process
+    would init and uninit libnotify without send a notification (LP: #570462).
+
+ -- Guillaume Mazoyer <respawneral@gmail.com>  Fri, 09 Jul 2010 13:21:27 +0200
+
 libnotify (0.4.5-1ubuntu3) lucid; urgency=low
 
   * debian/patches/03_lazy_init.patch: Fix return values in the failure cases,
only in patch2:
unchanged:
--- libnotify-0.4.5.orig/debian/patches/04_assertion-on-exit.patch
+++ libnotify-0.4.5/debian/patches/04_assertion-on-exit.patch
@@ -0,0 +1,16 @@
+## Description: Fix assertion when a process doesn't use notifications.
+## Origin/Author: Ubuntu/Guillaume Mazoyer
+diff -Nur -x '*.orig' -x '*~' libnotify-0.4.5/libnotify/notify.c libnotify-0.4.5.new/libnotify/notify.c
+--- libnotify-0.4.5/libnotify/notify.c	2010-07-09 13:24:41.832139185 +0200
++++ libnotify-0.4.5.new/libnotify/notify.c	2010-07-09 13:24:43.259143382 +0200
+@@ -129,7 +129,9 @@
+ 		}
+ 	}
+ 
+-	g_object_unref(_proxy);
++	if (_proxy != NULL) {
++		g_object_unref(_proxy);
++	}
+ 
+ 	_initted = FALSE;
+ }