F15: named using 90+% cpu

[sean darcy]

I've a recursive nameserver under no load taking 90% or more of the cpu. 
I've restarted, no joy.

There's an rsync task in the background, but nothing else.

What's going on?

sean

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND 

12766 named     20   0  237m  27m 2732 S 90.7  2.8   1352:27 named


rndc status
version: 9.8.1-P1-RedHat-9.8.1-3.P1.fc15
CPUs found: 2
worker threads: 2
number of zones: 19
debug level: 0
xfers running: 0
xfers deferred: 0
soa queries in progress: 0
query logging is OFF
recursive clients: 0/0/1000
tcp clients: 0/100
server is up and running

model name	: Intel(R) Core(TM)2 Duo CPU     E4500  @ 2.20GHz
stepping	: 13
cpu MHz		: 1200.000
cache size	: 2048 KB