[inocuo]

Finally i was able to fix it!

What i did is to change 2 lines of the index.php:

// $message     $message = clean(nl2br($_POST['message']));
		$message = isset($_POST['message']) ? $_POST['message'] : "";
		$message = clean_comment($message);
		$message = nl2br($message);

change last line for: $message = clean($message);

// $message		
	$message = isset($_POST['message']) ? $_POST['message'] : "";
	$message = clean_comment($message);
	$message = nl2br($message);

change last line for: $message = clean($message);

I don't know why. I found it trying (i'm not an expert)... but i think it's working. I'm using it at the moment and i haven't had any problem.
Luck!!