DNS cache errors

Hi malware fighters,

Yesterday my TrustWatch GeoTrust extension did not function in FF or Flock and I could not go to their site, this could be while their server is out temporarily but also because of Adblock blocking their site or images or a dns error. Now on the other comp everything is OK, we have to dive into this.
Read about dns error here: http://cable-dsl.home.att.net/dns_cache.htm#disable_neg_cache
Is there any newer info or is this uptodate? Seems so. Anyone?

polonus

Polonus,
The easiest way to fix cache errors that I know if is to clear the cache and go from there.