I posted earlier that 2.7.1 RC1 was released for testing and now the final version of WordPress 2.7.1 is available for download / upgrade.
2.7.1 fixes 68 tickets and so is a recommended upgrade.
If you already have WordPress 2.7 or 2.7.1 RC1 installed, you’ll receive an update notification that will allow you to upgrade WordPress from within WP-Admin itself. Or you can upgrade to the latest version by visiting Tools > Upgrade in WP-Admin. This will upgrade the files and the database as well in one step.
If you’re using 2.6.x or below you will need to manually download and upgrade your installation of WordPress.