WordPress 1.2.1 was released October 6, 2004.
The official release can be found here.
List of Files Revised in 1.2.1
wp-admin/admin-header.php
wp-admin/bookmarklet.php
wp-admin/categories.php
wp-admin/edit.php
wp-admin/options.php
wp-admin/post.php
wp-admin/wp-admin.css
wp-comments-post.php
wp-includes/functions-formatting.php
wp-includes/version.php
wp-login.php