Facebook's DNS is bug

fb_fail.dns

vnxs:~ Vinnix$ dig www.facebook.com

; <<>> DiG 9.4.3-P3 <<>> www.facebook.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 19977
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.facebook.com.		IN	A

;; ANSWER SECTION:
www.facebook.com.	51	IN	CNAME	star.c10r.facebook.com.

;; Query time: 171 msec
;; SERVER: 200.204.0.10#53(200.204.0.10)
;; WHEN: Mon Dec 10 20:57:45 2012
;; MSG SIZE  rcvd: 58

vnxs:~ Vinnix$ dig star.c10r.facebook.com.

; <<>> DiG 9.4.3-P3 <<>> star.c10r.facebook.com.
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 17120
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;star.c10r.facebook.com.		IN	A

;; Query time: 418 msec
;; SERVER: 200.204.0.10#53(200.204.0.10)
;; WHEN: Mon Dec 10 20:58:04 2012
;; MSG SIZE  rcvd: 40

vnxs:~ Vinnix$ dig star.c10r.facebook.com. @8.8.8.8

; <<>> DiG 9.4.3-P3 <<>> star.c10r.facebook.com. @8.8.8.8
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 24301
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;star.c10r.facebook.com.		IN	A

;; Query time: 45 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon Dec 10 21:00:58 2012
;; MSG SIZE  rcvd: 40