I wrote:
> I tried to use an ipv6 nameserver in /etc/resolv.conf.  The manpage
> claims it works, but has no examples to help get the syntax right.
> Both the v6 bracketed name and non-bracketed name had similar failure
> modes: many programs just started to hang.

Turns out my problem was lack of recursion in my nameserver when the
queries came from the v6 addresses.  Some things worked, others
didn't.  Adding my v6 address ranges to allow-recursion fixed things
nicely.

(Thanks to Greg Troxel for pointing me to his server and mentioning
that it won't allow recursion for me.  That put the right thought into
my mind.)

-wolfgang
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Wolfgang S. Rupprecht 		     http://www.wsrcc.com/wolfgang/
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