Steps to reproduce:
1. Create DNS name with single record: test.zone.example. 86400 IN TXT "testText"

1. run dig @127.0.0.1 test.zone.example -t ANY

   ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37363
   ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1

   ;; QUESTION SECTION:
   ;test.zone.example. IN ANY

   ;; ANSWER SECTION:
   test.zone.example. 86400 IN TXT "testText"

   ;; AUTHORITY SECTION:
   zone.example. 86400 IN NS unused-4-107.brq.redhat.com.

   ;; ADDITIONAL SECTION:
   unused-4-107.brq.redhat.com. 86400 IN A 10.34.4.107

2. delete tXTRecord attribute in LDAP

3. run rndc flush

4. repeat original query within cache_ttl seconds (configured in /etc/named.conf) - run dig @127.0.0.1 test.zone.example -t ANY

It returns (same result):

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37247
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1

;; QUESTION SECTION:
;test.zone.example.     IN  ANY

;; ANSWER SECTION:
test.zone.example.  86400   IN  TXT "testText"

;; AUTHORITY SECTION:
zone.example.       86400   IN  NS  unused-4-107.brq.redhat.com.

;; ADDITIONAL SECTION:
unused-4-107.brq.redhat.com. 86400 IN   A   10.34.4.107

It should return:

;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 25109
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;test.zone.example.     IN  TXT

;; AUTHORITY SECTION:
zone.example.       1   IN  SOA unused-4-107.brq.redhat.com. nonexistent.zone.example. 2012060388 123 123 666 1