Drupal 4.7.9 and 5.4 are now available for download. These are maintenance releases that fix problems reported using the bug tracking system, as well as a security vulnerability.
http://drupal.org/drupal-5.4
If you want to patch your own install, you can generate a 5.3 to 5.4 patch using:
wget http://ftp.drupal.org/files/projects/drupal-5.3.tar.gz
tar xfz drupal-5.3.tar.gz
wget http://ftp.drupal.org/files/projects/drupal-5.4.tar.gz
tar xfz drupal-5.4.tar.gz
diff -ru drupal-5.3 drupal-5.4 > drupal_53_to_54.patch
