>on a related note, but not involving arp, i've noticed something else
>that i think is related.
(snip)

	dhclient certainly leaves some routes/interface addresses (0.0.0.0)
	behind, it does not clean every thing up.  dhclient complicates
	the situation.  please test without dhclient if you want to see what
	is really happenning with arp/cloned routes.

itojun