Drupal 7.14 is now available, which contains bug fixes as well as fixes for security vulnerabilities from Drupal 7.13. Upgrading your existing Drupal 7 and 6 sites is strongly recommended.
In spite of this, we continue to use Drupal 7.13 since currently it’s more stable and reliable version than Drupal 7.14. The last release contains the changes in Drupal core which do not allow create website backups (shapshots) using installed modules.
At this point, we recommend you to upgrade to and use Drupal 7.13. Upgrade to Drupal 7.14 is unrecommended.May 03, 2012 - Drupal 7.14 released,