I am also seeing this issue, although I didn't see the dup notice until I'd posted to bug #78732. More data on my system and the actual Oops message are attached there. I won't repeat them for sake of storage.
** Tags added: atheros feisty madwifi -- atheros oops https://launchpad.net/bugs/76294 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
