host -6 failure

[mdh]

Howdy folks,
I'm having a little trouble understanding a problem that the `host` command in RELENG_7_0 (very recent) is having.  This is by and large my first time working with IPv6, which I've been meaning to learn for some time.  First off, I've got my zone file configured to return a AAAA record for x1.mydomain and named isn't complaining.  However, when I run `host -6 x1.mydomain`, host returns the following output:

(root at rapier) [/etc/namedb]: host -6 x1.mydomain
/usr/src/lib/bind/isc/../../../contrib/bind9/lib/isc/unix/socket.c:1179: internal_send: ::ffff:127.0.0.1#53: Invalid argument
/usr/src/lib/bind/isc/../../../contrib/bind9/lib/isc/unix/socket.c:1179: internal_send: ::ffff:IP.IP.IP.8#53: Invalid argument
/usr/src/lib/bind/isc/../../../contrib/bind9/lib/isc/unix/socket.c:1179: internal_send: ::ffff:127.0.0.1#53: Invalid argument
/usr/src/lib/bind/isc/../../../contrib/bind9/lib/isc/unix/socket.c:1179: internal_send: ::ffff:IP.IP.IP.8#53: Invalid argument
;; connection timed out; no servers could be reached

IP.IP.IP.8 is my ISP's DNS server, and is a third option just in case the localhost DNS server crashes or goes batty while I'm out drinking or somesuch.  Here's my resolv.conf, which shows ::1 listed as the second nameserver entry - however, it seems host -6 never even tries it.  

domain          mydomain
search          mydomain
nameserver      127.0.0.1
nameserver      ::1
nameserver      IP.IP.IP.8

The DNS server running on localhost is authoritative for mydomain.  I can ping it via localhost using both v4 and v6, and I can also ping the external v4 and v6 addresses just fine remotely.  

As I said, I'm new to IPv6, but this behavior seems to be counterintuitive.  Am I just doing it wrong?  

Thanks, Matt