Index: privatemsg.install
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/privatemsg/privatemsg.install,v
retrieving revision 1.11
diff -u -p -r1.11 privatemsg.install
--- privatemsg.install	12 Dec 2008 21:28:04 -0000	1.11
+++ privatemsg.install	8 Feb 2009 06:03:41 -0000
@@ -380,4 +380,10 @@ function privatemsg_update_6000() {
   db_drop_table($ret, 'temp_pm_index');
   
   return $ret;
-}
\ No newline at end of file
+}
+
+function privatemsg_update_6002() {
+  $ret = array();
+  $ret[] = update_sql("UPDATE {cache} SET cache = 2 WHERE module='privatemsg' AND delta='privatemsg-menu'");
+  return $ret;
+}
Index: privatemsg.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/privatemsg/privatemsg.module,v
retrieving revision 1.105
diff -u -p -r1.105 privatemsg.module
--- privatemsg.module	18 Dec 2008 16:26:33 -0000	1.105
+++ privatemsg.module	8 Feb 2009 06:03:41 -0000
@@ -844,6 +844,7 @@ function privatemsg_block($op = 'list', 
     $blocks = array();
     $blocks['privatemsg-menu'] = array(
       'info' => t('Privatemsg links'),
+      'cache' => 'BLOCK_CACHE_PER_USER',
     );
 
     return $blocks;