So I've updates Messages plugin to newest version had a massive php error:
[Tue Dec 09 17:52:00 2014] [error] [client ] PHP Fatal error: Call to a member function getParams() on a non-object in /home/ow_plugins/mailbox/classes/event_handler.php on line 1271, referer: http://my-site.com/admin/users/unverified?&page=2
I couldn't delete users due to this error...
Also this error is silence in Oxwall core_log...
Had to check my server logs.
Head outs , update with caution...