A.3. Keeping Drupal Up-to-Date

It’s not enough to just get Drupal installed, however; you also need to make sure to keep it up-to-date. New releases of modules and Drupal core come out periodically, most of which fix problems, some of which add new whiz-bang features, and some of which address critical security problems.

A.3.1. Version Numbers

When discussing updates, it helps to have some background information about Drupal’s version numbering system. For all the gory details, see http://drupal.org/handbook/version-info, summarized in Figure A-9.