You need to open file /components/com_jcomments/tpl/default/tpl_list.php (or tpl_tree.php if you're using treeview lauout) and replace:
function getHeader()
{
$object_id = $this->getVar('comment-object_id');
$object_group = $this->getVar('comment-object_group');
$btnRSS = '';
$btnRefresh = '';
if ($this->getVar('comments-refresh', 1) == 1) {
$btnRefresh = '<a class="refresh" href="#" title="'.JText::_('Refresh').'" onclick="jcomments.showPage('.$object_id.',\''. $object_group . '\',0);return false;"> </a>';
}
if ($this->getVar('comments-rss') == 1) {
$link = $this->getVar('rssurl');
$btnRSS = '<a class="rss" href="'.$link.'" title="'.JText::_('RSS').'" target="_blank"> </a>';
}
?>
<h4><?php echo JText::_('Comments'); ?><?php echo $btnRSS; ?><?php echo $btnRefresh; ?></h4>
<?php
}
with
function getHeader()
{
$object_id = $this->getVar('comment-object_id');
$object_group = $this->getVar('comment-object_group');
$commentsCount = $this->getVar('comments-count');
$btnRSS = '';
$btnRefresh = '';
if ($this->getVar('comments-refresh', 1) == 1) {
$btnRefresh = '<a class="refresh" href="#" title="'.JText::_('Refresh').'" onclick="jcomments.showPage('.$object_id.',\''. $object_group . '\',0);return false;"> </a>';
}
if ($this->getVar('comments-rss') == 1) {
$link = $this->getVar('rssurl');
$btnRSS = '<a class="rss" href="'.$link.'" title="'.JText::_('RSS').'" target="_blank"> </a>';
}
?>
<h4><?php echo JText::_('Comments') . ' (' . $commentsCount . ')'; ?><?php echo $btnRSS; ?><?php echo $btnRefresh; ?></h4>
<?php
}