[dns-operations] Very strange DNS bug at Hurricane Electric

Tue Mar 22 10:45:47 UTC 2016

On Tue, Mar 22, 2016 at 11:22:33AM +0100,
 Florian Weimer <fw at deneb.enyo.de> wrote 
 a message of 18 lines which said:

> SERVFAIL responses to RD=1 queries were significantly more lokily
> than for otherwise identical RD=0 query, even for supposedly
> well-run TLD servers.

Can you give an actual example? I've never seen that, specially for a
TLD name server (because dig asks recursion, by default, many people
should have noticed).