I installed GCCL on a site, the character count box (characters available) is displayed, and the limit is enforced, but the count in the box never changes.
With some effort I figured out how to hack comment-template.php to get the name in the form. This is from the page source:
<form action="http://www.sldforum.com/wp-comments-post.php" method="post" name="commentform" id="commentform">
The plugin seems to have made the changes to the textarea as well:
<textarea onkeydown="gcllCounter(this)" onkeyup="gcllCounter(this)" id="comment" name="comment" cols="45" rows="8" aria-required="true"></textarea>
What else should I be trying/
http://wordpress.org/extend/plugins/gregs-comment-length-limiter/