When the Admin, from the User Administration page, edits a user profile to change the login ID, the procedure errors after the ID has been changed. The ID has been changed in the database, but any option changes requested at the same time are not actioned.
When a user edits his own account from the My Account page, a change to the login ID is not actioned, even though the log file says that it has been done. Any option changes requested at the same time are, however, actioned properly. The user is still logged in, but there is no login ID shown in the page header. There is no error message.