[Zope] Why is acl_users "Contents" hidden?

I've been planning on using roles to control access to folders. Unfortunately, I find that if a user doesn't have the "Manage" role, requests to acl_users/manage_workspace will get redirected to acl_users/manage_access and no "Contents" tab will be shown. The user can still go to acl_users/manage_main and manage users, but he must know how to get there. Is there a simple fix? Thanks. --kyler