I can confirm that bug with Hardy Alpha 6 from alternate install. I was unable to use 'Unlock' button with fresh install and it still doesn't work for me with all available updates installed.
When I click 'Unlock' button it hangs for some time and then displays "Could not authenticate" error message.
Here's the output from terminal:
$ users-admin
** (users-admin:7549): CRITICAL **: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
I can confirm that bug with Hardy Alpha 6 from alternate install. I was unable to use 'Unlock' button with fresh install and it still doesn't work for me with all available updates installed.
When I click 'Unlock' button it hangs for some time and then displays "Could not authenticate" error message.
Here's the output from terminal:
$ users-admin
** (users-admin:7549): CRITICAL **: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.