Udhcpc fails on interface that starts with MAC of 00:00:00:00:00:00

I have a wireless USB card (Ralink 2770 based) that reports a MAC address of 00:00:00:00:00:00 until it is first brought up. If I start udhcpc before the the interface is first brought up, and then bring up the interface, udhcpc will never manage to get a lease (doing a SIGUSR1 causes it to try, but it consistently fails). I suspect that udhcpc is caching the MAC address the interface had when it was first started, and hence failing to communicate even after the MAC address gets set. I think that it would be appropriate for udhcpc to re-read the MAC address each time it starts trying to get a lease, as the performance hit would be trivial.

pr2@ta105:~$ lsb_release -rd
Description: Ubuntu 9.10
Release: 9.10

pr2@ta105:~$ apt-cache policy udhcpc
udhcpc:
  Installed: 0.9.8cvs20050303-2.1
  Candidate: 0.9.8cvs20050303-2.1
  Version table:
 *** 0.9.8cvs20050303-2.1 0
        500 http://aptproxy.willowgarage.com karmic/main Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
Architecture: i386
Date: Wed Apr 21 09:52:27 2010
DistroRelease: Ubuntu 9.10
Package: udhcpc 0.9.8cvs20050303-2.1
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: udhcp
Uname: Linux 2.6.31-14-generic i686
XsessionErrors:
 (gnome-settings-daemon:1547): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (gnome-settings-daemon:1547): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (nautilus:1587): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
 (polkit-gnome-authentication-agent-1:1604): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed