While most of the focus has been on Moodle 2.7’s release last week, minor releases for Moodle 2.6, 2.5 and 2.4 also became available from Moodle HQ. Each includes bug fixes and security patches.
Enhancements for Moodle 2.6.3 include updates to the wiki, usability fixes and enhancements to the performance of the assignment module. Check out the full notes here: http://docs.moodle.org/dev/Moodle_2.6.3_release_notes
For the full announcement visit https://moodle.org/mod/forum/discuss.php?d=259989