I’m trying to modify the header in the generated pages. I can go Config, then Settings, then “subscription-ui settings”, then “Header of public pages” and drop in my own HTML5 header, but it doesn’t replace the default XHTML, it just appears below it in the generated pages. See:
http://librarianendorsed.com/loveletters/?p=subscribe (and View Source)
This has come up once before, but the person who asked the question also answered it, though not in a way that I understand.