Description:
------------
Hello,

it seems the filter function is not working the "new" facebook emails like: apps+xxxxxxxxxxxxxxx.xxxxxxxxxxxxxxx.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx@proxymail.facebook.com where x is an alpha numeric character. It returns false.

This new feature comes from 2010 January, see: http://www.allfacebook.com/facebook-developers-prepare-to-gain-access-to-user-emails-2010-01

We got a lot of validation failures, cause of this, from facebook connected users, when we trying to use filter_var on these emails.

A bit strange, cause if I change the "apps+xxxxxxxxxxxxxxx" to "apps+xxxxxxxxxx", 5 letter shorted, it accepts. However this won't help us :)

Test script:
---------------
<?php

var_dump(filter_var("apps+xxxxxxxxxxxxxxx.xxxxxxxxxxxxxxx.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx@proxymail.facebook.com", FILTER_VALIDATE_EMAIL));


Expected result:
----------------
It should return the given email address.

Actual result:
--------------
Returns false.