I think it would make better sense, instead of having a whole separate admin page for Custom Breadcrumbs, for each Content Type to have a Breadcrumbs tab alongside "Edit" and "Manage Fields", etc. (e.g. as admin/content/node-type/story/breadcrumbs). (After all, the relationship of content types to custom breadcrumbs is one-to-one, isn't it?) That would centralize configuration options around node types--the way a builder would naturally think about them--so that he/she could come to the Content Type screen and do all the configuration there in one place. The Content Type page would become a functional configuration checklist and reduce the likelihood of forgetting a feature or getting off-track. What does everyone else think?