http://blog.icann.org/?p=227

This is [...] notice that there is a [...] change to the IP address for one of the authorities listed for the DNS root zone.
The change is to L.ROOT-SERVERS.NET, [...] The new IPv4 address for this authority is 199.7.83.42. [...]
It will replace the previous IP address of 198.32.64.12. [...]
It is expected that the old address will continue to work for at least six months after the transition, but will ultimately be retired from service.

Il va y avoir du fichier named.ca à modifier...