named/BIND 8.1.2-5 won't accept inbound zone xfers

[Ian Eure <ieure@crosssound.narrows.com>]

I'm having a really nasty time getting my BIND zone slave to update from the
zone master. the slave keeps saying:
---
Jan  9 13:24:21 Phaktory named[145]: Zone "zone.domain" (class 1) SOA serial# (10719991) rcvd from [xxx.xxx.xxx.xxx] is < ours (121219981)
--- (names/ips changed to protect he innocent)
but it never gets updated. Anyways, here is the relevant part of my named.conf
on the slave ns:
---
zone "zone.domain" {
        type slave;
        file "zone.domain/zone.hosts";
        allow-query { any; };
        allow-update { none; };
        allow-transfer { localservers; };
        masters { xxx.xxx.xxx.xxx; };
};
---
and the master:
---
zone "zone.domain" {
        type master;
        allow-query { any; };
        allow-update { none; };
        allow-transfer { localservers; };
        file "zone.domain/zone.hosts";
};
---
localservers is an acl with the ips of both nameservers:
---
        acl localservers {
                xxx.xxx.xxx.xxx;
                yyy.yyy.yyy.yyy;
        };
---
So, can anyone suggest what's wrong here?

Thanks in advance

-- 
 ______________________________________________________________
| ian eure, network admin, freelance security consultant, and  |
| manically depressed paranoid schizophrenic, at your service. |
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