I've added a column to a content type view of a list, and while changing the column order SharePoint asks this:
Update Sites and Lists
Specify whether all child site and list content types using this type should be updated with the settings on this page. This operation can take a long time, and any customizations made to the child site and list content types will be lost.
Update all content types inheriting from this type?
That sounds dangerous to me; is there a way to view and/or backup&restore all child site and list content types using this type?