Minor improvement:
As the admin, when I click on Configure on a repository (url /RepositoryManagement/AdminIndex.aspx), it would be nice to reduce the margins or increase the popup size so all options are available. It isn't always obvious that additional links are available by using the scrollbar.
Also I think that the order could be changed to match a more logical view from a process perspective e.g. starting with User Groups, Users, Sections, Access Permissions...