I have the same problem, I blacklisted bcm43xx to prevent crashes until we have a solution.
** Attachment added: "lspci output" http://librarian.launchpad.net/6494004/pciinfo.txt -- 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
