Querying locally on a nameserver - odd behavior

[blrmaani]

I have a DNS server (which is both forwarder and authoritative NS) and I see this odd behavior locally on the host:

dig @localhost   <name>    # returns immediately with right response

dig @<host-local-ip-on-eth0>  <name>   # returns sometimes, timesout most of the time


I have allow-query {any;} in BIND config and the <name> above is local on the host (obtained via slaving). The listen-on is set to 'any' on port-53

What am I missing? Why this odd behavior?

thanks
Blr