Version 1.3 of antimony has been released at antimony.sourceforge.net

http://antimony.sourceforge.net/

The latest version includes small changes to the Antimony language (most notably, the ability to set the display name of elements), and larger enhancements to the QTAntimony editor. Various stability issues have been finally tracked down and fixed, and new features have been added such as a more robust error message handling, the ability to convert SBML to different levels and versions, and better documentation.