This bur fiest appeared 2 days ago in 8.164. All the IP addresses assigned in DHCP have unknown shown against them, while they have an entry in the DNS static with reverse lookup enabled.
Possibly also associated is that in some reports the IPv6 address (lookup) is used eg IPv6 where other reports IPv4 is used.
How can I tell, because my IPv6 address is from a London based server using a sixxs tunnel.
Ian