I have been trying to upgrade to wordpress version 3.1.2 but after the upgrade, my custom permalinks are not working. All my post links are showing up 404 not found page. When I switch to default perlink setting, it works.
Not only it is happening with WP 3.1.2 but the same thing is happening with WP 3.0.6 also.
I have been upgrading manually using FTP.
I have performed every trick/hack that is available on net e.g disabling plugins, rewritting .htaccess file etc...
I am using (postID/post name) permalink structure..
I again have to go back to my previous version due to permalinks not functioning. My theme is comapatible with WP 3.0
My blog URL is http://www.environmentabout.com/
Problem: The main page or home page is working fine at above URL. But when I visit my post pages with custom permalink structure (http://www.environmentabout.com/928/global-warming-how-rapidly-will-sea-level-rise) they return 404 page not found error. But it works with default permalink structure(http://www.environmentabout.com/?p=928).