Me too, 13.04 upgrade has caused vsftp to stop working with precisely the same symptoms:
auth.log: Apr 26 10:36:29 ftpserv vsftpd: PAM audit_log_acct_message() failed: Operation not permitted
Me too, 13.04 upgrade has caused vsftp to stop working with precisely the same symptoms:
auth.log: acct_message( ) failed: Operation not permitted
Apr 26 10:36:29 ftpserv vsftpd: PAM audit_log_