Being the Nice Bloke that I am I have checked that it is indeed a IEvn problem. In doing so I remembered why I like Netscape.
So, in IE, Virgin adverts makes the computer almost unusable, in Netscape I don't even notice.
It is still a bit of a problem as I would guess a very high percentage of users use IE and quite a few of those will just stop comming here if it is that bad.