.london broke our intranet (sort of)
We use levels in our hostnames to indicate location, eg foo.london.wibble.com is in the London DC. Our previous DNS config was search wibble.com, so that you could type ssh foo.london to go to foo.london.wibble.com.
When .london went active, this broke all these short host lookups. We had to change our DNS config to search london.wibble.com newyork.wibble.com (+8 others) wibble.com, which means 8 DNS requests instead of 1, and change everything everywhere to use either FQDN or very short names, and remove any duplicated host names across sites.
I still don't see the purpose of them. It's never going to be 'transport.gov.london' or 'tower.london' is it?
