v2ex dns 解析.com.cn还是有问题啊

[abao]

dig @178.79.131.110 www.msdchina.com.cn

; <<>> DiG 9.7.6-P1 <<>> @178.79.131.110 www.msdchina.com.cn
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57725
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.msdchina.com.cn. IN A

;; ANSWER SECTION:
www.msdchina.com.cn. 300 IN A 178.79.131.110

;; Query time: 3962 msec
;; SERVER: 178.79.131.110#53(178.79.131.110)
;; WHEN: Tue Oct 9 09:46:13 2012
;; MSG SIZE rcvd: 53



dig @178.79.131.110 t.sina.com.cn

; <<>> DiG 9.7.6-P1 <<>> @178.79.131.110 t.sina.com.cn
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55969
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;t.sina.com.cn. IN A

;; ANSWER SECTION:
t.sina.com.cn. 44 IN CNAME e.dpool.weibo.com.
e.dpool.weibo.com. 44 IN A 180.149.134.17

;; Query time: 537 msec
;; SERVER: 178.79.131.110#53(178.79.131.110)
;; WHEN: Tue Oct 9 09:46:32 2012
;; MSG SIZE rcvd: 78

www.msdchina.com.cn解析不了，t.sina.com.cn可以