Read the official Contao announcements.
Contao 2.10.4 is available
by Leo Feyer
Contao version 2.10.4 is available. The bugfix release fixes a few minor issues, including resolving the script name when using the "fpm-fcgi" interface, triggering the command scheduler in the Internet Explorer 7 and 8 and purging the template cache after creating a new template. Also, the theme importer has been adjusted so deleted themes can be restored after an import.
Find out what has been done
Download the release from github.com.