I am playing around with groups, and when i create a new group, and then go to the discussion tab and click the button to create a new topic, it takes me to a login screen - while keeping me logged in. If i login, nothing really happens, I stay on the login screen.
This seems to happen with new groups of either Private or Closed (have not tested Public) and is the same if I have group approval on or off. It is also the same regardless of whether i create the group as admin or as a normal user.
Eventually by going to the control panel and changing something and then clicking save it starts to work normally.
I also have tried logging out and refreshing and that works but only after i have gone to the control panel and saved something.
AS 1.5.3 and DNN 5.2, FireFox on a Mac.