I do have other things in the site root. When I had the blog in the root and tried to access them, it would redirect me to the blog. I could never access anything in the root besides the blog.
But that’s beside the point. It worked before the upgrade, now it does not.
This is the query it’s running to get the posts:
SELECT wp_posts.* FROM wp_posts WHERE 1=1 AND (wp_posts.ID = ‘0’) AND wp_posts.post_type = ‘page’ ORDER BY wp_posts.post_date DESC