Reverse DNS on Home Network?

[Andrew]

> 
> Just because nslookup is stupid about this, doesn't mean regular lookups 
> (e.g. those generated by a browser while surfing) fail, does it? If 
> regular lookups are failing as well, it's probably due to some separate 
> problem.

Good point.

However, the DNS lookups have been rather flakey lately.

Sometimes I can tell that it's switching over to the secondary
DNS server (my ISP), because the lookups take longer.

What is the easiest way to tell for sure which DNS
server my browser is using?

Drew