I have noticed that the refresh data button on Objects tab doesn't refresh the users (anymore?). Can this be fixed? A workaround is to connect the main tab again.
Certainty of death, small chance of succes, What are we waiting for... (Gimly)
If I open the "Users" folder in the Object Browser, then create a user in an external tool, select the "Users" folder, and click on the "Refresh" button, the new user is now included. Can you confirm that this scenario does not work for you?