ЧПУ в 3.3.3

Правим:
admin/applications/forums/modules_public/forums

Заменяем:

$this->registry->output->silentRedirect($this->settings['base_url']."showtopic=".$topicData['tid']. $stUrlParam ."#entry".$post['pid'], $topicData['title_seo'], 302, 'showtopic' );

На:

$this->registry->output->silentRedirect($this->settings['base_url']."showtopic=".$topicData['tid']. $stUrlParam ."#entry".$post['pid'], '', 302, 'showtopic' );