Could not reverse map

SSH-2.0-OpenSSH_3.4p1 Debian 1:3.4p1-1

I'm seeing this error:

moseley@mardy:~$ fgrep 'reverse' /var/log/auth.log | head -1 May 11 16:53:42 mardy sshd[4870]: Could not reverse map address 192.168.1.2.

I'm using "views" in Bind9 so that my internal (NAT'ed) LAN can lookup internal machines:

moseley@mardy:~$ dig -x 192.168.1.2 @localhost | grep bumby 2.1.168.192.in-addr.arpa. 604800 IN PTR bumby.

Why is sshd unable to lookup the reverse.

-- 
Bill Moseley
moseley@hank.org