Moodle 1.6.2 is a maintenance release that fixes a few bugs found in the stable Moodle 1.6 branch. You can find out more about these in the Moodle 1.6 release notes. A number of the fixes relate to security so we recommend that all previous installations of Moodle upgrade to this one.
Moodle 1.6.2 is available from the Moodle download site, and also, as usual, via CVS.