Hello Andrew!

  AB> ...I tried running dhclient -p ne0 which may have
    > reduced the frequency of these errors a little, but I
    > would like to be able to weed them out altogether.

  AG> If your 'ne0' is working correctly these errors should
    > not be related to that interface.  You mean 'dhclient
    > -q ne0' right?

  AB> I meant 'dhclient -p ne0' (as in 'port'), but -q seems
    > to work too.

  AG> Hmm, I was confused by you not listing the port.

But I did!  (see above ;-)

So, do you think I can solve my DHCP problems by rolling a
custom kernel?

Regards,
  - Andy.