With the latest major version (2.6) coming next week, it was good to see the latest minor releases published.
If you are currently using Moodle 2.3, 2.4 or 2.5 then you should consider upgrading to the latest minor release. As normal with minor releases, the releases contain bug fixes and a number of security fixes.
The Moodle 2.5.3 releases addresses 224 bugs (see 2.5.3 release notes)
The Moodle 2.4.7 releases addresses 150 bugs (see 2.4.7 release notes)
The Moodle 2.3.10 releases addresses 150 bugs (see 2.3.10 release notes)
If you are still on the older Moodle 2.3 (which was released June 2012) you should consider upgrading to a later version now, ideally looking at 2.5.3.
For downloads as always check out the Moodle.org download pages on http://download.moodle.org