Strange regression between 9.3 and 9.4

[Adam Tkac]

Hi,

I've got report that reverse IPv6 lookups in 9.4.1 series are badly 
broken. I have this configuration (only interesting parts are here):

Reverse IPv6 loopback zone declaration
zone 
"0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" 
IN {
        type master;
        file "named.ip6.local";
        allow-update { none; };
};

zone file:
@       IN      SOA     dhcp-lab-102.englab.brq.redhat.com. 
atkac.redhat.com.  (
                                      1997022700 ; Serial
                                      28800      ; Refresh
                                      14400      ; Retry
                                      3600000    ; Expire
                                      86400 )    ; Minimum
       IN      NS      dhcp-lab-102.englab.brq.redhat.com.
1      IN      PTR     localhost.

when I try $dig @127.0.0.1 -x ::1 output is sometimes correct but often 
looks like this:

; <<>> DiG 9.4.1 <<>> @127.0.0.1 -x ::1
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42159
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa. 
IN PTR

;; AUTHORITY SECTION:
1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa. 
86400 IN SOA 
1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa. 
. 0 28800 7200 604800 86400

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jun 12 18:16:29 2007
;; MSG SIZE  rcvd: 125

Is it known issue? It isn't reproducible on 9.3.4

Regards, Adam