There have been a lot of complaints in Blogger help forums about the lack of a custom 404 (File not found) error page. This is a big issue, not just for user experience, but also SEO. Of course, if you’re overly concerned with SEO, then you’re probably not using Blogger in the first place. However, if Blogger wants to be a serious contender in the blog CMS field, it should give us necessary features. Many improvements have come recently, but have mostly focused on design…..