8.1 RC2 Wireless Networking Broken

Fri Jul 23 17:15:09 UTC 2010

I switched my Thinkpad T61p from FreeBSD 8.1 RC2 i386 to amd64 and 
experienced a failure of the wireless networking.  The setup is as follows:

/etc/rc.conf
-----------------------
wlans_ath0="wlan0"
ifconfig_wlan0="DHCP"

On boot the "wlan0" interface was NOT created.  If I manually ran 
"ifconfig wlan0 create wlandev ath0", then everything was OK.

The exact same setup (rc.conf, loader.conf, wpa_suplicant.conf) works 
fine under FreeBSD 8.1 RC2 i386