Drupal 7.9, a maintenance release with numerous bug fixes (no security fixes) is now available for download. Several critical bugs with the OpenID have been addressed in this release, among other critical and major bugs, and a few new API features. See the Drupal 7.9 release notes for a full listing.
Upgrading your existing Drupal 7 sites is strongly recommended. There are no new features in these releases. For more information about the Drupal 7.x release series, consult the Drupal 7.0 release announcement.
Drupal 7.9 is mainly a bug fix release. The full list of changes between the 7.8 and 7.9 releases can be found by reading the 7.9 release notes. A complete list of all bug fixes in the stable 7.x branch can be found in the git commit log.
– Upon first upgrading to 7.9, there are reports of Panels Pages going missing at #1323162: Panels disappear after updating core to 7.9. Solution is to clear the cache.
drush si in Drush 5.x causes error #1314392: drush site-install on Drupal 7.9 fails with a fatal error "Call to undefined function cache_get()". The fix is to apply the patch at http://drupal.org/node/673020#comment-5106306 or update to the latest -dev release of D7.