arin.net DNS problems

I had intermittent failures to resolve whois.arin.net today,
and haven't bothered to investigate this until now: someone
please forward this to an after-hours person at ARIN,
hostmaster@arin.net will probably not be read for a while.

Reason:
BUCHU.arin.net. 3H IN A 192.100.59.110
arrowroot.arin.net. 3H IN A 198.133.199.110

are both not returning any A record for 'whois.arin.net'

$ dig +norec @a.gtld-servers.net arin.net ns
;; ANSWER SECTION:
arin.net. 2D IN NS l3.nstld.com.
arin.net. 2D IN NS a3.nstld.com.
arin.net. 2D IN NS c3.nstld.com.
arin.net. 2D IN NS f3.nstld.com.
arin.net. 2D IN NS g3.nstld.com.
arin.net. 2D IN NS buchu.arin.net.
arin.net. 2D IN NS arrowroot.arin.net.

All *.nstld.com servers respond with:

whois.arin.net. 3H IN A 192.149.252.43

The zone serials are consistent:

;; ANSWER SECTION:
arin.net. 3H IN SOA arrowroot.arin.net. bind.arin.net. (
                                        2003061812 ; serial
                                        3H ; refresh
                                        10M ; retry
                                        2W ; expiry
                                        1H ) ; minimum

However, buchu and arrowroot.arin.net BOTH answer very oddly when
queried for an SOA: they are returning an A record for arin.net -
not quite what was asked for!

$ dig +norec @198.133.199.110 arin.net soa
; <<>> DiG 8.2 <<>> +norec @198.133.199.110 arin.net soa
; (1 server found)
;; res options: init defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1426
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 10, ADDITIONAL: 2
;; QUERY SECTION:
;; arin.net, type = SOA, class = IN

;; ANSWER SECTION:
arin.net. 3H IN A 192.149.252.17

;; AUTHORITY SECTION:
arin.net. 3H IN NS L3.NSTLD.COM.
arin.net. 3H IN NS G3.NSTLD.COM.
arin.net. 3H IN NS F3.NSTLD.COM.
arin.net. 3H IN NS E3.NSTLD.COM.
arin.net. 3H IN NS D3.NSTLD.COM.
arin.net. 3H IN NS C3.NSTLD.COM.
arin.net. 3H IN NS BUCHU.arin.net.
arin.net. 3H IN NS B3.NSTLD.COM.
arin.net. 3H IN NS arrowroot.arin.net.
arin.net. 3H IN NS A3.NSTLD.COM.

;; ADDITIONAL SECTION:
arrowroot.arin.net. 3H IN A 198.133.199.110
BUCHU.arin.net. 3H IN A 192.100.59.110

;; Total query time: 17 msec
;; FROM: sonet.conti.nu to SERVER: 198.133.199.110
;; WHEN: Mon Sep 8 18:34:11 2003
;; MSG SIZE sent: 26 rcvd: 263

However, an 'any' query yields:

$ dig +norec @198.133.199.110 arin.net any

; <<>> DiG 8.2 <<>> +norec @198.133.199.110 arin.net any
; (1 server found)
;; res options: init defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55882
;; flags: qr aa; QUERY: 1, ANSWER: 16, AUTHORITY: 0, ADDITIONAL: 4
;; QUERY SECTION:
;; arin.net, type = ANY, class = IN

;; ANSWER SECTION:
arin.net. 3H IN SOA arrowroot.arin.net. bind.arin.net. (
                                        2003061812 ; serial
                                        3H ; refresh
                                        10M ; retry
                                        2W ; expiry
                                        1H ) ; minimum

arin.net. 3H IN A 192.149.252.17
arin.net. 3H IN MX 10 smtp2.arin.net.
arin.net. 3H IN MX 20 smtp1.arin.net.
arin.net. 3H IN NS L3.NSTLD.COM.
arin.net. 3H IN NS G3.NSTLD.COM.
arin.net. 3H IN NS F3.NSTLD.COM.
arin.net. 3H IN NS E3.NSTLD.COM.
arin.net. 3H IN NS D3.NSTLD.COM.
arin.net. 3H IN MX 40 cumin.apnic.net.
arin.net. 3H IN NS C3.NSTLD.COM.
arin.net. 3H IN NS BUCHU.arin.net.
arin.net. 3H IN NS B3.NSTLD.COM.
arin.net. 3H IN MX 30 aso.icann.org.
arin.net. 3H IN NS arrowroot.arin.net.
arin.net. 3H IN NS A3.NSTLD.COM.

;; ADDITIONAL SECTION:
smtp2.arin.net. 3H IN A 192.149.252.32
smtp1.arin.net. 3H IN A 192.149.252.33
arrowroot.arin.net. 3H IN A 198.133.199.110
BUCHU.arin.net. 3H IN A 192.100.59.110

;; Total query time: 117 msec
;; FROM: sonet.conti.nu to SERVER: 198.133.199.110
;; WHEN: Mon Sep 8 18:36:01 2003
;; MSG SIZE sent: 26 rcvd: 437

The *.nstld.com servers are answering to these queries in
normal fashion.

bye,Kai