[cflsystems]

Not sure about 4.3 but in 4.2 is in include/func/func.core.php

 # Page title
 $html_page_title = '';
 if ($current_area == 'C' && $templater->_tpl_vars['location']) {
  $charset = isset($templater->_tpl_vars['default_charset']) ? $templater->_tpl_vars['default_charset'] : 'ISO-8859-1';
  $tmp = array();
  $location = $templater->_tpl_vars['location'];
  if ($config['SEO']['page_title_format'] != 'A')
   $location = array_reverse($location);
  foreach ($location as $v) {
   $tmp[] = strip_tags($v[0]);
  }
  $html_page_title = implode(' - ', $tmp);
 }

which I have replaced with "-"