Index: trunk/kernel/include/usersession.php
===================================================================
diff -u -r289 -r357
--- trunk/kernel/include/usersession.php	(.../usersession.php)	(revision 289)
+++ trunk/kernel/include/usersession.php	(.../usersession.php)	(revision 357)
@@ -820,7 +820,7 @@
          for($c=0;$c<count($cats);$c++)
          {
              $index = $cats[$c];
-             if(is_numeric($PermValue[$index]))
+             if( isset($PermValue[$index]) && is_numeric($PermValue[$index]) )
              {             
                  $Value = $PermValue[$index];
                  break;