authconfig still uses old Bluecurve icon: http://hg.fedorahosted.org/hg/authconfig/raw-file/e6656338029b/user_auth.png I think our Design Team would love to create a new modern one. Do you want me to contact with them about it?
If you want to contact them, please do. Attach the icon here then. Thanks.
Ticket has been filed: https://fedorahosted.org/design-team/ticket/98
Authconfig icon has been replaced upstream.