I've confirmed this in oneiric (0.9.1.90-0ubuntu6) and precise (0.9.1.90-0ubuntu7).
I glanced at the network-manager-applet code and believe that wpa-none should be supported for ad-hoc networks. I don't see any obvious fixes in the upstream git repo, nor any related upstream bugs. However, I did find this interesting comment in the bug tracker: https://bugzilla.gnome.org/show_bug.cgi?id=654772#c1
I've confirmed this in oneiric (0.9.1.90-0ubuntu6) and precise (0.9.1. 90-0ubuntu7) .
I glanced at the network- manager- applet code and believe that wpa-none should be supported for ad-hoc networks. I don't see any obvious fixes in the upstream git repo, nor any related upstream bugs. However, I did find this interesting comment in the bug tracker: https:/ /bugzilla. gnome.org/ show_bug. cgi?id= 654772# c1