ntpd fails to synchronize on FreeBSD 6.3-STABLE

[Pongthep Kulkrisada]

Hi all,

I upgraded to FreeBSD 6.3-STABLE, I have 3 problems.
I think this is the right place to ask. Please someone point me out.

(1)
Previously, I ran ntpd on FreeBSD 6.2-RELEASE with dial-up, I had no problems.
Late last year I switched to ADSL and stayed behind NAT.
I found that ntpd couldn't synchronize with IPv4 NTP servers.
It got synchronized with ONLY IPv6 NTP servers.
(Note that I got IPv6 from freenet6, even machine behind NAT can still get
real IPv6 address using UDP encapsulation.)

Last week I upgraded from source to FreeBSD 6.3-STABLE (buildworld).
I found that I can not get sync with any NTP servers both IPv4 and IPv6.
The followings are my information.

# cat /etc/ntp.conf
server time.navy.mi.th prefer
server asia.pool.ntp.org
server ntp.nict.jp
driftfile /etc/ntp.drift

# ntpdc -c peers
     remote           local      st poll reach  delay   offset    disp
=======================================================================
=122.154.11.67   192.168.1.10    16 1024    0 0.00000  0.000000 0.00000
=starlite.ispwor 192.168.1.10    16 1024    0 0.00000  0.000000 0.00000
=ntp-b2.nict.go. 192.168.1.10    16 1024    0 0.00000  0.000000 0.00000

messages from syslog
Feb 25 20:00:36 bsdhost ntpd[711]: ntpd 4.2.0-a Mon Feb 18 21:23:47 ICT 2008 (1)
Feb 25 20:00:36 bsdhost ntpd[711]: bind() fd 10, family 28, port 123, addr 2001:5c0:8fff:fffe::42ad, in6_is_addr_multicast=0 flags=0 fails: Can't assign requested address

# uname -a
FreeBSD bsdhost.localdomain 6.3-STABLE FreeBSD 6.3-STABLE #0: Mon Feb 18 23:20:40 ICT 2008     root at bsdhost.localdomain:/usr/obj/usr/src/sys/SMP  i386

(2)
My next problem after buildworld is ``man pages are not updated''.
They are still FreeBSD 6.2. What happen? How to fix it?

(3)
My last problem may be irrelevant to freebsd-stable.
The problem is ``handbook is not updated''.
I ran cvsup -g -L 2 /usr/share/example/cvsup/doc-supfile.
I got many files/dirs in /usr/doc.
I simply cd into /usr/doc then ``make install'' and ``make all install''
I guess that but it just doesn't work.
Actually I can read the new handbook from www.freebsd.org.
But I'm very curious to know how to update handbook in my computer.

Please someone point me out.

Thanks in advance.
Pongthep