I just installed that and when i try to use it i get:
main:~# dhclient3
Internet Software Consortium DHCP Client V3.0.1rc8
Copyright 1995-2001 Internet Software Consortium.
All rights reserved.
For info, please visit
http://www.isc.org/products/DHCP
socket: Protocol not available - make sure
CONFIG_PACKET (Packet socket) and CONFIG_FILTER
(Socket Filtering) are enabled in your kernel
configuration!
The old dhcp-client worked fine..