odd dns behavior on osx

[Alan Batie]

I've been using www.v6.facebook.com since I found out about it earlier
this week, and OSX is exhibiting some odd behavior: after a short time
(the cache timeout period?), gui apps, specifically firefox and safari
complain "can't find host".  From a terminal window, I can ping6 the
site, after which firefox and safari can again find it themselves.  Very
odd...

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