diff --git a/offlineimap/head/offlineimap.sgml b/offlineimap/head/offlineimap.sgml
index ff68a03..9db0552 100644
--- a/offlineimap/head/offlineimap.sgml
+++ b/offlineimap/head/offlineimap.sgml
@@ -11,7 +11,7 @@
     <refentryinfo>
       <address><email>jgoerzen@complete.org</email></address>
       <author><firstname>John</firstname><surname>Goerzen</surname></author>
-      <date> $Date: 2003-01-08 20:01:29 -0600 (Wed, 08 Jan 2003) $ </date>
+      <date> $Date: 2003-01-29 14:36:13 -0600 (Wed, 29 Jan 2003) $ </date>
     </refentryinfo>
 
     <refmeta>
@@ -897,6 +897,18 @@ rm -r ~/.offlineimap/AccountName/INBOX</programlisting>
 	</para>
       </refsect2>
 
+      <refsect2>
+	<title>Multiple Instances</title>
+	<para>&OfflineIMAP; is not designed to have several instances (for instance, a cron job and an interactive invocation) run over the same
+	  mailbox simultaneously.  It will perform a check on startup and
+	  abort if another &OfflineIMAP; is already running.  If you need
+	  to schedule synchronizations, please use the
+	  <property>autorefresh</property> settings rather than cron.
+	  Alternatively, you can set a separate <property>metadata</property>
+	  directory for each instance.
+	</para>
+      </refsect2>
+
       <refsect2>
 	<title>Copying Messages Between Folders</title>
 	<para>