Post attachments. Non image files that are linked to a post will be listed and linked below the post. (sam2kb)
All default skins now support featured posts and intro posts. (fplanque).
Category, tag, archive and search pages now only display post excerpts by default. (Requires a 3.x skin; otherwise the skin will display full posts as before). This can be controlled in the Blog settings > SEO. (fplanque)
Skins can now have a _skin.class.php file to override default Skin behaviour and provide skin specific settings. Demo: the custom skin has configurable header colors. The settings can be changed through Blog Settings > Skin Settings (fplanque) – Anyone is welcome to extend those settings for any skin you like.
Skins can now have an item.css file to specify content formats. This will be reused in WYSIWYG editors. (fplanque)
URLs & SEO:
Homepage: option to 301 redirect to canonical homepage. (fplanque)
Date archives: option to 301 redirect to canonical urls. (fplanque)
Option to support rel="canonical" instead of or when 301 redirect cannot be used. (fplanque)
Options to select how much content to display (excerpt|teaser|normal) on different types of pages. (fplanque)