.io is managed by Afilias. They took over and migrated the registry to their system in June. Afilias manages many other TLDs including:

.adult .ag .archi .bet .bio .black .blue .bz .global .green .in .info .kim .lgbt .ltda .me .mn .mobi .ngo/.ong .org .pet .pink .poker .porn .promo .red .sc .shiksha .vc .vegas .vote .voto

They are a very reliable registry operator. This was a bad screw up, and I guess it had something to do with the migration.