Hi I have exactly the same problem and it is 'solved' just by removing the RPZ option.
options { directory "/etc/bind"; dnssec-enable no; dnssec-validation no; allow-recursion { internals; }; allow-query { internals; }; allow-query-cache { internals; }; max-cache-size 2048M; response-policy { zone "cache.rpz" max-policy-ttl 3600; }; }; I'm interested in another better solution :) Philippe Simonet