6.0-release beta1 breaks ndis for dell truemobile 1400

Hi All,
I have not extensively used the ndis driver since I am not often
around wireless networks, but
after installing 5.4-release I compiled the driver using 
cd /usr/src/sys/modules/ndis
make install
cd /usr/src/sys/modules/if_ndis
ndiscvt -i bcmwl5a.inf -s bcmwl5.sys -o ndis_driver_data.h
make && make install

as recommended, with the bcmwl* files being the ones here:
http://netfiles.uiuc.edu/kaduk/www/*

The self-extracting driver (for windows) also generated a bcmwl5.inf
(not 'a'), but ndiscvt
produced an error whilst trying to read this file, so I used the 'a'
version, and ndiscvt finished
successfully; if_ndis was produced with no errors, and I was able to
kldload if_ndis.ko and ndis.ko.  Upon doing this, console messages
were produced recognizing my Dell TrueMobile 1400 (broadcom bcm4324
chipset), but i didn't have a wireless network to use then.
Since then, I have performed a source upgrade to 6.0-release beta1
(cvsup last saturday; can't be more precise since I must boot windows
to use wireless :(   ).
I just today had occasion to use the wireless card, and kldload()-ing
if_ndis resulted in a panic().  I didn't save the message for two
reasons: (1), I thought it was just that if_ndis.ko had not been
rebuild with world, and (2) I'm using my laptop at a friend's
appartment with no serial console.  After performing several
iterations of cleaning for ndis, if_ndis, and wlan, and
rebuilding/installing, I produced if_ndis.ko, ndis.ko, and wlan.ko
that I could successfully kldload() with no panic.  However, there
were no console messages that appeared indicating that the system had
found my hardward, leading to the statement in the subject that the
beta breaks ndis for this card.  I have already posted a pciconf -lv
to the list in this thread:
http://docs.freebsd.org/cgi/getmsg.cgi?fetch=116619+0+current/freebsd-current

What steps can I take to help debug this regression?

Thanks,

Ben Kaduk