Need little help i got cookie called null is it dangerouse?

this is what going on every time i go to get rid of cookies

when a tracking cookie is removed, in the detailed results, it used to show an entry for orphan cookie, it no longer shows that,now it shows and entry for null anyone know what going on with this why is it comeing up null is it dangerouse

Message Edited by reaverone on 08-28-2009 06:36 PM
Message Edited by reaverone on 08-28-2009 06:37 PM