Add this to the template.php file to change the separator between breadcrumbs

Breadcrumb Separator

//REPLACE BREADCRUMBS SEPARATOR ========================================
function sndev_breadcrumb($variables) {
  $sep = ' / ';
  if (count($variables['breadcrumb']) > 0) {
    return implode($sep, $variables['breadcrumb']);
  }
  else {
    return t("Home");
  }
}