I'm using WordPress with Yoast WordPress SEO plugin v1.4.1 (I upgraded from the previous version). I found out that there is no robots "noindex" meta tags on not found pages (such as http://www.speedysoftware.com/uri/blog/1 ). Is it a bug which needs to be fixed? I checked with the default theme and it doesn't fix the problem. I read the Changelog but I don't see any fix in newer versions.