[eluser]Mr-H[/eluser]
hi a had this probleme to, it seems that the session class creat each time you load the page "that containt a flash " a hashed md5 session_id, to prevent this in youre config.php look for $config['sess_match_ip'] = FALSE;
and replace with:
$config['sess_match_ip'] = TRUE;
that all, hope it will help you...
sorry my english