Yep, I've had that, big, big sites not being found. They normally come back in a few minutes. But, last week, I went to one site I use a lot and I got another site !! I thought I had some virus that was hijacking my browser. But it was doing it on both IE and Firefox and on two other PCs I have.

So after a bit of googling I changed the DNS server to OpenDNS and no problems since.

Excellant pictures BTW.