It's (currently) the hostname of my personal DNS resolver that was experiencing an issue. If you wanted to run mtr, or check the DNS server logs for my IP, or something like that, there you go.
(The IP isn't running a public recursive DNS server, though.)
And both of them show a number of errors for irrelevant query types, which shouldn't happen either.
I don't know. Do you run the DNS servers?
I dunno. Maybe an ISP is experiencing issues today, or the DNS server people recently made a configuration change.