On Mon, Nov 17, 2008 at 4:20 AM, James Hess <mysidia at gmail.com> wrote: > One of the secondary/tertiary recursive resolvers may hand the client > a cached response that had been obtained before the registrar took any > action. Yes, and that'd make a good case for the good old ops practice of dialing down the TTL for a while before any NS change is made. --srs