Well I ran into a problem when running a large PowerDNS installation with over 1000 domains and was planning a IP migration of the primary DNS server running at my company.
DNS inspection has to be configured
static (inside,outside) 188.8.131.52 192.168.1.5 netmask 255.255.255.255 dns
8.3 and later
cisco(config)# object network internal-server-dns
cisco(config-network-object)# host 192.168.1.5
cisco(config-network-object)# nat (inside,outside) static 184.108.40.206 dns