I have seen this topic many times on this board and it seems that when every thing is set up correctly and this test is still failing that the answer seems to be for some cache to be reset.  I am trying to figure out if I am having a genuine mistake or if I fall into the latter category.  As far as I can tell based on the digs below I can get correct answers on ipv6 from all the proper places.  Am I missing what step 3 of the guru test requires ?
Thanks
dig ns ketema.net
; <<>> DiG 9.7.3 <<>> ns ketema.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42952
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 4
;; QUESTION SECTION:
;ketema.net.                    IN      NS
;; ANSWER SECTION:
ketema.net.             3517    IN      NS      ns48.domaincontrol.com.
ketema.net.             3517    IN      NS      ns47.domaincontrol.com.
;; ADDITIONAL SECTION:
ns47.domaincontrol.com. 59392   IN      A       216.69.185.24
ns47.domaincontrol.com. 44573   IN      AAAA    2607:f208:206::18
ns48.domaincontrol.com. 59392   IN      A       208.109.255.24
ns48.domaincontrol.com. 44649   IN      AAAA    2607:f208:302::18
;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Jun  6 08:30:11 2012
;; MSG SIZE  rcvd: 171
dig @2607:f208:206::18 AAAA ketema.net
; <<>> DiG 9.7.3 <<>> @2607:f208:206::18 AAAA ketema.net
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16116
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 0
;; WARNING: recursion requested but not available
;; QUESTION SECTION:
;ketema.net.                    IN      AAAA
;; ANSWER SECTION:
ketema.net.             3600    IN      AAAA    2001:470:5:138:213:72ff:fe30:5b82
;; AUTHORITY SECTION:
ketema.net.             3600    IN      NS      ns48.domaincontrol.com.
ketema.net.             3600    IN      NS      ns47.domaincontrol.com.
;; Query time: 85 msec
;; SERVER: 2607:f208:206::18#53(2607:f208:206::18)
;; WHEN: Wed Jun  6 08:35:08 2012
;; MSG SIZE  rcvd: 128
dig ns 2.8.b.5.0.3.e.f.f.f.2.7.3.1.2.0.8.3.1.0.5.0.0.0.0.7.4.0.1.0.0.2.ip6.arpa
; <<>> DiG 9.7.3 <<>> ns 2.8.b.5.0.3.e.f.f.f.2.7.3.1.2.0.8.3.1.0.5.0.0.0.0.7.4.0.1.0.0.2.ip6.arpa
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18648
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;2.8.b.5.0.3.e.f.f.f.2.7.3.1.2.0.8.3.1.0.5.0.0.0.0.7.4.0.1.0.0.2.ip6.arpa. IN NS
;; AUTHORITY SECTION:
8.3.1.0.5.0.0.0.0.7.4.0.1.0.0.2.ip6.arpa. 10800 IN SOA ns1.he.net. hostmaster.he.net. 2012060603 10800 1800 604800 86400
;; Query time: 80 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Jun  6 08:36:37 2012
;; MSG SIZE  rcvd: 147
dig @ns1.he.net PTR 2.8.b.5.0.3.e.f.f.f.2.7.3.1.2.0.8.3.1.0.5.0.0.0.0.7.4.0.1.0.0.2.ip6.arpa
; <<>> DiG 9.7.3 <<>> @ns1.he.net PTR 2.8.b.5.0.3.e.f.f.f.2.7.3.1.2.0.8.3.1.0.5.0.0.0.0.7.4.0.1.0.0.2.ip6.arpa
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 65127
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available
;; QUESTION SECTION:
;2.8.b.5.0.3.e.f.f.f.2.7.3.1.2.0.8.3.1.0.5.0.0.0.0.7.4.0.1.0.0.2.ip6.arpa. IN PTR
;; ANSWER SECTION:
2.8.b.5.0.3.e.f.f.f.2.7.3.1.2.0.8.3.1.0.5.0.0.0.0.7.4.0.1.0.0.2.ip6.arpa. 86400 IN PTR ketema.net.
;; Query time: 73 msec
;; SERVER: 216.218.130.2#53(216.218.130.2)
;; WHEN: Wed Jun  6 08:38:04 2012
;; MSG SIZE  rcvd: 114
			
			
			
				How long ago did you set it?
[carl@ipv6router ~]$ dig ns ketema.net
; <<>> DiG 9.6.-ESV-R3 <<>> ns ketema.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51302
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 2
;; QUESTION SECTION:
;ketema.net.                    IN      NS
;; ANSWER SECTION:
ketema.net.             3581    IN      NS      ns48.domaincontrol.com.
ketema.net.             3581    IN      NS      ns47.domaincontrol.com.
;; ADDITIONAL SECTION:
ns48.domaincontrol.com. 33649   IN      A       208.109.255.24
ns47.domaincontrol.com. 33649   IN      A       216.69.185.24
;; Query time: 3 msec
;; SERVER: 2001:470:c27d:e000:88cb:fe1b:c4b0:92a1#53(2001:470:c27d:e000:88cb:fe1b:c4b0:92a1)
;; WHEN: Wed Jun  6 08:57:19 2012
;; MSG SIZE  rcvd: 115