Improved breadcrumbs and titles for 404 pages - props Jrf.
Moved XSL stylesheet from a static file in wp-content folder to a dynamic one, allowing it to work for sites that prevented the wp-content dir from being opened directly, f.i. through Sucuri's hardening.
Added a link in the XSL pointing back to the sitemap index on individual sitemaps.
When remove replytocom is checked in the permalink settings, these are now also redirected out.
Added filters to OpenGraph output functions that didn't have them yet.