Denied Domains question

Hello Group,

I've got a question regarding the denied Domains list. I have a list
and it's been working fine. I use the standard format for entering
URLs into the list of ".domain.parent domain".
I ran into a problem with www.veoh.com were I couldn't use
".veho.com". It didn't deny the access if I did that. If I add the
full address of www.veoh.com it does deny access. This is not a big
deal but I would like to know why this happes. Does anyone know why
this is happening with that domain?

TIA
Dave