diff -u sysklogd-1.5/debian/changelog sysklogd-1.5/debian/changelog
--- sysklogd-1.5/debian/changelog
+++ sysklogd-1.5/debian/changelog
@@ -1,3 +1,11 @@
+sysklogd (1.5-5ubuntu3.1) jaunty; urgency=low
+
+  * debian/postrm: If syslog user is still logged in, ignore errors when
+    trying to remove it.  This happens when rsyslog is running in the
+    upgrade case.  LP: #401056
+
+ -- Michael Terry <michael.terry@canonical.com>  Wed, 16 Sep 2009 14:56:58 -0400
+
 sysklogd (1.5-5ubuntu3) jaunty; urgency=low
 
   * Add test for /etc/unbound/syslogd to debian/rc (init script) to grab the
diff -u sysklogd-1.5/debian/postrm sysklogd-1.5/debian/postrm
--- sysklogd-1.5/debian/postrm
+++ sysklogd-1.5/debian/postrm
@@ -3,7 +3,17 @@
 set -e
 
+deluser_syslog() {
+	# 1 is returned if the syslog user is still logged in (e.g. rsyslog
+	# is now running as that user).  Which is valid, so ignore it.
+	# Debian doesn't run rsyslog as the 'syslog' user, so this is Ubuntu-only
+	# for the moment.
+	deluser --system --quiet syslog || ERR=$?
+	if [ -z "$ERR" -o "$ERR" = "1" ]; then ERR=0; fi
+	return $ERR
+}
+
 if [ "$1" = "purge" ]
 then
-    deluser --system --quiet syslog
+    deluser_syslog
     update-rc.d sysklogd remove >/dev/null
 fi