On September 11, 2013, WordPress 3.6.1, a maintenance and security update, was released to the public. It fixed 13 bugs in version 3.6, which was a very smooth major release. You can do the update automatically from the Dashboard > Updates menu in your site’s admin area.
For more information on this release, see the release notes: http://codex.wordpress.org/Version_3.6.1.
Stay safe!