I updated to the latest version (4.1.7) and it broke my site. New posts can be submitted, but no replies can be submitted to any post.
This needs to be fixed IMMEDIATELY.
I've applied some temporary fix on this file JoomlaFolder/components/com_easydiscuss/themes/wireframe/composer/composer.js , that reply should work now.
By the way, thanks for reported and I will log this into issue tracker and release another version soon.