POSSIBLE Root Server Problem

[David Cary Hart]

Bind = bind-9.2.5rc1-1
Platform = Linux (Fedora Core 3)
Bind running as caching name server and to provide network
resolution. 

I notice that, after running bind for a period of time, a plain
"dig" only resolves one or two root servers:
-------------------------------------------------------------
;; ANSWER SECTION:
.                       441186  IN      NS     
M.ROOT-SERVERS.NET.
.                       441186  IN      NS     
A.ROOT-SERVERS.NET.
.                       441186  IN      NS     
B.ROOT-SERVERS.NET.
.                       441186  IN      NS     
C.ROOT-SERVERS.NET.
.                       441186  IN      NS     
D.ROOT-SERVERS.NET.
.                       441186  IN      NS     
E.ROOT-SERVERS.NET.
.                       441186  IN      NS     
F.ROOT-SERVERS.NET.
.                       441186  IN      NS     
G.ROOT-SERVERS.NET.
.                       441186  IN      NS     
H.ROOT-SERVERS.NET.
.                       441186  IN      NS     
I.ROOT-SERVERS.NET.
.                       441186  IN      NS     
J.ROOT-SERVERS.NET.
.                       441186  IN      NS     
K.ROOT-SERVERS.NET.
.                       441186  IN      NS     
L.ROOT-SERVERS.NET.

;; ADDITIONAL SECTION:
J.ROOT-SERVERS.NET.     527586  IN      A       192.58.128.30

;; Query time: 4 msec
;; SERVER: 192.168.0.50#53(192.168.0.50)
;; WHEN: Fri Mar 11 13:16:06 2005
;; MSG SIZE  rcvd: 244
------------------------------------------------------------------
If I restart bind (named) all of the root servers are resolved.

a. Is this a problem?
b. If so, what should I do about it?

Thanks.
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