Comment 1 for bug 859569

in the oneiric kernel doesn't support new tx header on b43 and 5.100.138 firmware requires that feature

anyway lastest old tx supported firmware source can download here but requires b43-fwcutter-0.15 for extraction
http://www.lwfinger.com/b43-firmware/broadcom-wl-5.10.144.3.tar.bz2