When somebody submit a comment on the main page of my blog it goes to the 404 page, but if you then go back to the main page and refresh the comment that was submitted is in fact there. Thus the comment gets posted but the site does not successfully redirect back to the main page. If you submit a comment at any of the posts it works perfectly without a problem.
The blog is at http://www.pietpetoors.com/blog
The main page is a fixed page.