$this->_comments[$i]->getVar('com_email')
$text = (false != $admin_view) ? $thread[$key]['obj']->getVar('com_text') . '<div style="text-align:right; margin-top: 2px; margin-right: 2px;">' . _CM_STATUS . ': ' . $this->_statusText[$thread[$key]['obj']->getVar('com_status')] . '<br />IP: <span style="font-weight: bold;">' . $thread[$key]['obj']->getVar('com_ip') . '</span><br />' . _CM_EMAIL . ' :<span style="font-weight: bold;">' . $this->_comments[$i]->getVar('com_email') . '</span></div>' : $thread[$key]['obj']->getVar('com_text');
variable $i don't set.
I resolved bug, removing the email code.