On April 26, 2011, WordPress 3.1.2 was released to the public. This is a security update for all previous WordPress versions.
For version 3.1.2, the database version (db_version in wp_options) remained at 17516.
To download WordPress 3.1.2, update automatically from the Dashboard > Updates menu in your site's admin area or visit http://wordpress.org/download/release-archive/.
For step-by-step instructions on installing and updating WordPress:
If you are new to WordPress, we recommend that you begin with the following:
wp-includes/post-template.php wp-includes/version.php wp-includes/user.php wp-includes/query.php readme.html wp-admin/includes/class-wp-posts-list-table.php wp-admin/includes/update-core.php wp-admin/press-this.php