I have the same issue. The message states that it will not work with older versions of the firmware (pre 4.0 version) however I updated my firmware and can confirm that I have 4.1 installed and still no luck.
-- Broadcom bcm43xx broken with 2.6.20.8 kernel https://launchpad.net/bugs/85099 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs