RDNS changes don't take effect on ns5.he.net

[comptech]

ns1 through ns4 return the correct authority but ns5 returns the old RDNS servers I had set.
Can someone fix this please?

$ dig @ns1.he.net -x 2001:470:1f11:1bc::

; <<>> DiG 9.4.2-P2 <<>> @ns1.he.net -x 2001:470:1f11:1bc::
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42091
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. IN PTR

;; AUTHORITY SECTION:
c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. 4900 IN NS xenon.it.cx.

;; Query time: 104 msec
;; SERVER: 216.218.130.2#53(216.218.130.2)
;; WHEN: Sun Aug 16 13:50:02 2009
;; MSG SIZE  rcvd: 115

$ dig @ns2.he.net -x 2001:470:1f11:1bc::

; <<>> DiG 9.4.2-P2 <<>> @ns2.he.net -x 2001:470:1f11:1bc::
; (2 servers found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8004
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. IN PTR

;; AUTHORITY SECTION:
c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. 4900 IN NS xenon.it.cx.

;; Query time: 119 msec
;; SERVER: 2001:470:200::2#53(2001:470:200::2)
;; WHEN: Sun Aug 16 13:50:07 2009
;; MSG SIZE  rcvd: 115

$ dig @ns3.he.net -x 2001:470:1f11:1bc::

; <<>> DiG 9.4.2-P2 <<>> @ns3.he.net -x 2001:470:1f11:1bc::
; (2 servers found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 59088
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. IN PTR

;; AUTHORITY SECTION:
c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. 4900 IN NS xenon.it.cx.

;; Query time: 118 msec
;; SERVER: 2001:470:300::2#53(2001:470:300::2)
;; WHEN: Sun Aug 16 13:50:11 2009
;; MSG SIZE  rcvd: 115

$ dig @ns4.he.net -x 2001:470:1f11:1bc::

; <<>> DiG 9.4.2-P2 <<>> @ns4.he.net -x 2001:470:1f11:1bc::
; (2 servers found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41153
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. IN PTR

;; AUTHORITY SECTION:
c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. 4900 IN NS xenon.it.cx.

;; Query time: 91 msec
;; SERVER: 2001:470:400::2#53(2001:470:400::2)
;; WHEN: Sun Aug 16 13:50:14 2009
;; MSG SIZE  rcvd: 115

$ dig @ns5.he.net -x 2001:470:1f11:1bc::

; <<>> DiG 9.4.2-P2 <<>> @ns5.he.net -x 2001:470:1f11:1bc::
; (2 servers found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26714
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 3, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. IN PTR

;; AUTHORITY SECTION:
c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. 4900 IN NS ns1.afraid.org.
c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. 4900 IN NS ns2.afraid.org.
c.b.1.0.1.1.f.1.0.7.4.0.1.0.0.2.ip6.arpa. 4900 IN NS ns3.afraid.org.

;; Query time: 159 msec
;; SERVER: 2001:470:500::2#53(2001:470:500::2)
;; WHEN: Sun Aug 16 13:50:18 2009
;; MSG SIZE  rcvd: 154