Sem o Google não dá...

Meu Debian estava funcionando direitinho com squid+iptables e começou a apresentar o seguinte problema:

While trying to retrieve the URL: http://www.google.com.br/
The following error was encountered:
Unable to determine IP address from host name for www.google.com.br
The dnsserver returned:
Server Failure: The name server was unable to process this query.
This means that:
The cache was not able to resolve the hostname presented in the URL.
Check if the address is correct.

Alguem sabe o que é isso?

Cara, tenta apagar os cookies e os arquivos temporários da internet. Sempre que dá erro aki isso resolve.