administrators will be able to define a custom 403 page, just as they
can define 404 pages now.
This needs to be documented in the "Changes since / migrating to ..."
pages.
configurable! Menu items can be disabled, repositioned, added and
so on.
Upgrading to requires you to run update.php.
This functionality depricates some of the 'navigation modules' in the
contributions repository. Furthermore, modules can now 'suggest'
menu items and site adminstrators can choose to enable them. Modules
in the contributions repository should try to take advantage of this.
Dries Buytaert