Yesterday minor releases of each major Moodle branch were released, including the 2.7.1. Following the major/minor release cycle and policy from Moodle.org, this is the last release of the 2.4 branch and the 2.5 branch will now only be supported for security fixes.
2.7.1 brings minor enhancements and functional improvements to Moodle, including the ability to use the PDF Assignment marking even when the assignment is set to multiple attempts. In addition you’ll find that “Add-on” has now been renamed to “Plugin” to be more consistent with language across Moodle.org and into the future.
For the full 2.7.1 release notes check out: http://docs.moodle.org/dev/Moodle_2.7.1_release_notes
All release information is available here: http://docs.moodle.org/dev/Releases