After I updated WordPress to 3.1, the blog defaulted to the latest post and stayed there. All new posts weren’t visible unless you used breadcrumb nav to get to them. It was really frustrating. I totally reinstalled WP and the default page reset to the latest post again and stayed there. I had looked around a couple of times, both searches ended in frustration and futility. Today I looked again and found an obscure post that mentioned something like this could be caused by using a redirection plug-in for error pages. As it turned out, I had it. So I switched it off and we are back in business!.