I can confirm this bug, after upgrade to feisty fawn herd 4, my wireless card (broadcom 4318) doen't work.
I've got the message: /var/log/syslog.0:Feb 23 00:34:35 medula kernel: [ 418.600000] bcm43xx: YOUR FIRMWARE IS TOO OLD. Firmware from binary drivers older than version 4.x is unsupported. You must upgrade your firmware files. This bug just happen with kernel-2.6.20-8, I've tested with kernel-2.6.20-6 and run perfect. -- bcm43xx completely broken in feisty https://launchpad.net/bugs/85404 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs