DNS problem after upgrade to woody

[Giulio Morgan]

After upgrading, I am unable to connect to mailserver with fetchmail, to remore
hosts with apt, telnet, ssh, irc, lynx or mozilla. Messages are:
unable to resolve host...
something wicked happened...
domain name could not be confirmed...
it appears that there is a problem with DNS and I have no idea how to resolve
it.
Help needed and appreciated, Thanks,
Peter
-- 
Giulio Morgan
[EMAIL PROTECTED]