Update: Drupal 7.41 is now available.
Drupal 7.40, a maintenance release with numerous bug fixes (no security fixes) and several new features, is now available for download. See the Drupal 7.40 release notes for a full listing.
Upgrading your existing Drupal 7 sites is recommended. There are no major, non-backwards-compatible features in this release. For more information about the Drupal 7.x release series, consult the Drupal 7.0 release announcement.
Drupal 7.40 contains bug fixes and small API/feature improvements only. The full list of changes between the 7.39 and 7.40 releases can be found by reading the 7.40 release notes. A complete list of all changes in the stable 7.x branch can be found in the git commit log.
See the 7.40 release notes for details on important changes in this release.