Publish date: 1. January 0001
> The key changes since Drupal 4.5 include: > > - PHP5 support. > - Better search usability, improved results and relevancy. > - Personal contact forms for registered users. > - Improved multi-site support to run multiple Drupal sites from a > single code base. > - Extensible RSS 2.0 syndication support for enclosures (e.g. > podcasts) and categories. > - Ping Ping-O-Matic, to ping all major ping services. > - Usability improvements for permissions, block configuration, > statistics tracking, logs, forum configuration, content > administration, etc.