utf_normalizer messed the UTF8 messages/PMs - Hungarian

Hi,

I use full utf-8 system (database, browser etc.) and I have a problem with the phpBB3 since RC7, including the latest stable version.

The problem shown on the attachments, the expexcted result also attached.
I enabled the debug directives for phpBB (config.php) and based on 'fberci' from the Hungarian forum (http://phpbb.hu/forum/hsz/26621), I wrote a mentioned 'debug' code.
The output of that are shown on the attached pictures.

The code itself went into the posting.php, right after this code:

// Start session management
$user->session_begin();
$auth->acl($user->data);

print (isset($_POST['message'])) ? '<pre>' . $_POST['message'] . "\n\n" . request_var('message', '', true) . "\n\n" . utf8_normalize_nfc(request_var('message', '', true)) . '</pre>' : '';

Any hints are welcome.
You can see it with your own eyes and you can try the problematic installation at http://www.osbusiness.hu/phpBB

Thank you, István