Gantry for WordPress Version 1.21 has been released.
This release fixes the bugfix script which could cause the sites to break. If after updating to 1.20 your site broke - please revert your database to the backup from before 1.20. If you already recreated the widgets you can skip this step, as the newly created widgets will already have proper data.
Changelog for WordPress Gantry 1.21
# Fixed the incrementation bug in the bugfix.php script which could cause a widgets id conflict