<p>Ben Collins ♦ was making some changes to the comment system and something he did caused the userscript to stop working (<a href="http://chat.meta.stackoverflow.com/transcript/message/1454912#1454912">ref. 1</a>, <a href="http://meta.stackexchange.com/questions/190228/did-se-change-something-that-caused-the-pro-forma-comment-script-to-stop-working#comment589333_190228">ref 2</a>). The author of the script, Benjol, is aware of the problem and AFAIK is working on a fix. </p>

<p>Several (<a href="http://meta.askubuntu.com/a/7061/44179">one</a>, <a href="http://stackapps.com/a/4241/14817">two</a>) workarounds have been suggested until the issue has been resolved.</p>

<p>Tim Stone <a href="http://chat.meta.stackoverflow.com/transcript/message/1456036#1456036">said he might be able to give it a look</a> as well.</p>

<hr>

<p><strong>update august 12</strong></p>

<p>The issue has been resolved in a recent update to the script. </p>

<p>For more information see this answer <a href="http://stackapps.com/a/4241/14817">http://stackapps.com/a/4241/14817</a></p>