> Early in the resolution process named made a query for blog.rop.io AAAA
> and got a truncated response with a missing EDNS record and a missing TC
> flag.

I reported this problem to Rage4 DNS who say they are running PowerDNS
3.1. So I think it might be an old PowerDNS bug fixed by
http://wiki.powerdns.com/trac/changeset/2649

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/
Portland, Plymouth, Biscay: Northeast 4 or 5, occasionally 6 in Biscay. Slight
or moderate. Fair. Good.