On August 12, 2009 , WordPress version 2.8.4 was released to the public. For information on the security enhancements in this version, see Changelog for 2.8.4.
For Version 2.8.4, the database version (db_version in wp_options) remained at 11548.
To download WordPress 2.8.4, visit http://wordpress.org/download/release-archive/
For step-by-step instructions on installing and upgrading WordPress:
If you are new to WordPress, we recommend that you begin with the following: