Parental Controls virgin media problem

Hi everyone, I'm on a macbook running 10.6.8.

I set up a user for my young children, and using parental controls restricted the websites they could view. I've allowed youtube, and the parental control works great because they can't click on the ads etc.

Last sunday I upgraded my virgin media broadband to Large and plugged in my new 'superhub' modem/router.

When I finally had it all set up and let them back onto the computer, we went to the kids user and tried to visit youtube.com and it just wouldn't load up at all. Error message was – "the connection was interrupted" and said that couldn't connect, youtube wasn't available etc.

On my user we were able to access youtube, allbeit really pretty slowly. Was pretty confused as this is youtube! one of the biggest websites in the world, surely youtube wouldn't be 'down'.

My 'tech'y friend said that he'd found out that virgin use their own youtube servers in order for it to be quicker etc.

Do it need to allow a different website on the parental control list now? Or is there some other setting I need to change/add somewhere?

Must be some kind of change in the information reaching my computer as the website is not blocked and the error is different to when trying to connect to a blocked site.

Have posted on the virginmedia forums, bot nothing yet. Any help would be greatly appreciated thanks...