Hi guys,
I seem to get this every now and then (3.5.34):
 
Notice: session_start() [function.session-start]: ps_files_cleanup_dir: opendir(/shared/sessions) failed: Permission denied (13) in /mounted-storage/home81b/sub004/sc44664-SMCA/xxx/xxx/includes/common.php on line 50
 
any idea what causes this and how to get rid of it?