Did any one had any problem with this?

I have a test setup where I have the following directives for dns caching:
use_dns_cache=yes                    #enabling DNS caching
dns_cache_del_nonexp=yes             # deletes entries if the memory is becoming full
dns_cache_flags=0
dns_cache_gc_interval=120
dns_cache_init=on
dns_cache_max_ttl=3600
dns_try_ipv6=no                      # yes if you want the lookup to be for IPv6 also
dns_try_naptr=yes


despite the fact that I have dns_try_ipv6=no kamailio sends a AAAA request to the DNS server.
This is an extra request in a case where it seems not to be needed.
Also, it seems that a  NAPTR request is not sent - I need to investigate more, being just a hunch for now.

All the best

Radu Costin