Drupal 7.5, a maintenance release which fixes security vulnerabilities is now available for download. Drupal 7.7 also fixes other issues reported through the bug tracking system.
We make two versions of Drupal core available, so you can choose to only include security fixes (Drupal 7.5) or security fixes and bugfixes (Drupal 7.7). You can choose your preferred version. We are trying to make it easier and quicker to roll out security updates by making security-only releases available as well as ones with bugfixes included. We hope this helps you roll out the fixes as soon as possible. Read more details in the handbook.