It seems that WordPress can find all the trackback urls in the posts and trackback them automatically, but FancyBlog can’t. I tried googling something, and then find this by ijliao. Just now, I copied the trackback_url function from WP and modified it for FancyBlog. I don’t know whether FancyBlog works correctly or not, but let’s take a try… ^^a
Update: The auto-discovery mechanism in wordpress seems not to fit the spec.