Fixed http://drupal.org/node/209117
Changes overview:
5.x-1.6 contained a stupid last-minute, not-enough-testing mistake which even opened security holes if you allow users to specify the alt attribute of an image in a node. See SA-2008-008 - Meta tags - Arbitrary code execution for the advisory.
Official stable release compatible with Update status version 5.x-2.0. Only a few minor bugs have been fixed since the 5.x-1.0-beta release:
Release candidate; see CHANGELOG.txt for more information.
This update contains the bugfixes mentioned by agilpwc. No other changes from version 1.5 have been made at this time.