--- a/UPGRADE	Wed Apr 28 05:28:36 2010 +0000
+++ b/UPGRADE	Wed Apr 28 05:37:14 2010 +0000
@@ -38,7 +38,7 @@
          In prior setups the service dovecot was configured slightly different.
          If you have set the command attribute 'user' to 'nobody:mail', so
          either remove the group mail or replace it with the group nobody
-         or nogroup.
+         or nogroup. (see command output from: id -ng nobody)
 
          e.g.: flags=DRhu user=nobody argv=/usr/local/lib/dovecot/deliver …