I can confirm this problem on Ubuntu 11.04 with network-manager 0.8.4+git.20110228t143901.5cdded6-0ubuntu1 and polkit 0.101-1
I can confirm this problem on Ubuntu 11.04 with network-manager 0.8.4+git. 20110228t143901 .5cdded6- 0ubuntu1 and polkit 0.101-1