I'm sorry but I can't confirm your workaround on my Dell Inspiron 6400 with a Broadcom Corporation Dell Wireless 1390 WLAN(bcm43xx based). However the output is very similar.
** Attachment added: "NetworkManager with --no-daemon connecting to an unsecured network" http://launchpadlibrarian.net/8721274/network-manager.log -- Unable to connect to unsecured/unencrypted wireless networks (bcm43xx-based chips only?) https://bugs.launchpad.net/bugs/73759 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs