A quick fix from http://blogs.infobidouille.com/Matt/index.php/post/2011/04/29/Ubuntu-11.04-Natty-Narwhal-sur-MacBook-Pro-2009
remove the line beginning with "dkms remove" from /var/lib/dpkg/info/bcmwl-kernel-source.prerm
A quick fix from http:// blogs.infobidou ille.com/ Matt/index. php/post/ 2011/04/ 29/Ubuntu- 11.04-Natty- Narwhal- sur-MacBook- Pro-2009
remove the line beginning with "dkms remove" from /var/lib/ dpkg/info/ bcmwl-kernel- source. prerm