I have recently realized that there is no indicator once the headers are sticky (the top forum bar with links including 'Documentation') if using the New Style, or that also include the section with the 'FreeNAS.org' link.
My plan is to have the breadcrumbs not to also become sticky, because this makes a very large top header that reduces viewing size for messages or editing, but to hopefully shift it onto one of the other two sections, where space permits. If not entire breadcrumbs, then at least the current forum name, such as "Ganz großes Kino theme" - Discussion, Comments, Requests while viewing this message for example. Other long-winded discussions with multiple posts and possibly imperfect topic control (at times) make it very difficult to know which forum one is reading simply by message context.