New in PunBB 1.3 (compared to 1.2.*)

Extension system based on hooks allowing one click extension installation (no code mods anymore).
Hotfixes: little extensions operatively fixing security bugs.
Notifications for new versions of forum or installed extensions.
Full support for UTF-8.
Fancy URLs.
Improved markup/css to provide greater flexibility and accessibility.
Better BBCode parser.
Styles now have their own template sets.
Official extensions produced and maintained by PunBB developers:
- PunBB extensions repository access (pre-installed)
- Private messaging
- Attachments
- Polls
- Post approval
- Anti-SPAM and CAPTCHA
- Hook Navigator
- Log
- BBCode bar
Language file support for the admin console.
Improved/added more database helper functions.
Constants and variables renamed to maximize extensions portability.
MySQL requirement bumped to 4.1.2 to realize proper UTF-8 support.
Improved update script aiming for full UTF-8 compatibility.