Several innovations concerning the application programming interface (API) of SPIP, specifically the number of functions available to programmers (especially for plugins).
This new version, therefore, earns much of its credit from the new plugins that will become available (for example, the "crayons" plugin which enables editing articles directly from the public site ; the automatic XHTML validation plugin, etc.)
When migrating an existing site to this new stable version, the following notes are important:
* directory reorganisation, in particular the relocation of CACHE and ecrire/data to tmp/ ; image thumbnails relocated to local/, and relocating configuration files (mes_options.php, connect.php) to config/;
* the ecrire/ directory therefore, now only contains scripts, and it can be shared amongst several site URLs (refer to the article on shared provisioning);
* If you use image filters (most notably image_reduire), a now-repaired bug has broken compatibility in the thumbnail naming convention. So SPIP will need to recreate all your thumbnails. You can delete thumbnails in the IMG directory prior to migration.
