Hello,
It looks like IPv6 addresses bound to loopback interfaces no longer
work.
% ifconfig lo0
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=3<RXCSUM,TXCSUM>
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x5
inet6 2607:f178:0:3::12 prefixlen 128
% route -n get -inet6 2607:f178:0:3::12
route to: 2607:f178:0:3::12
destination: ::
mask: default
gateway: 2607:f178::1
interface: mxge0
flags: <UP,GATEWAY,DONE,STATIC>
recvpipe sendpipe ssthresh rtt,msec mtu weight expire
0 0 0 0 1500 1 0
% uname -a
FreeBSD exodus 9.0-CURRENT FreeBSD 9.0-CURRENT #8: Sat Sep 5 10:23:33 EDT 2009
bw at exodus:/usr/obj/usr/src/sys/COMRADE amd64
bw.