Drupal 7.8 released and available for download worldwide. The Drupal 7.8 is a maintenance release that contains many bug fixes, and no security fixes or new feature added.
There is an important note if you are upgrading the Drupal 6 installation to Drupal 7.7 but using the multilingual sites feature, you will find if the node bodies displayed as empty, read this page to know the story. And this issue already fixed in version 7.8.
You can read the release note for complete list of all bug fixes, and download Drupal 7.8 here.