If you have automatic updates turned on, your site will automatically be updated with this release.
FYI, I have my sites set to auto-update for minor releases, like this one. That is also the default setting since WP 3.7.
Read How to Turn Off WordPress 3.7 Auto Updates if you want to change your settings. And yes, it involves getting into the code.
The announcement on the WordPress.org blog from Andrew Nacin lists the following improvements and tweaks:
- Embedded Tweets – the Twitter API change several months ago broke embedding on all WP sites. WP has now switched to the SSL version of the Twitter oEmbed.
- WP_Query – category queries when pretty permalinks (aka postname) were being mishandled, as were taxonomy queries.
- Responsive Themes – fixes for various screen readers, to determine size, IE8 improvements, and several CSS clashes fixed.
- New Dashboard – the MP6 plugin was incorporated into the core with 3.8 and caused the following issues that have now been fixed: dead zone on submit buttons, prevent color scheme previewing when editing another user, contrasting border to feature pointers added, OCD alignment and Dashicons updated.
- Dashboard Widgets – the Quick draft widget was ignoring the default comment and ping status and breaking long words to prevent overflow. And the At A Glance widget was linking to Pages or Posts for Authors or Contributors.
What’s in Store for 3.9
TinyMCE may be upgraded to version 4. And the image editor may be included into the Media Manager.
There is also talk of improving the HTML5 audio/video support that was originally added in version 3.6.