Since the release of the new Drupal packaging system, this release marks the first stable release of Acidfree 4.6. It contains some minor bug fixes and a fix to a security vulnerability. If you are using Acidfree 4.6, please upgrade to this release now.
Please note that this module requires the PEAR::Validate class in order to validate payment card numbers before they are sent to ProtX. The Validate class needs to be in the PHP include path.