Drupal breadcrumb truncated

My drupal breadcrumb stops at home link like:

home>

And not

home > title level1 > T level 2

In my 开发者_运维百科template file template.php i have this:

function exceliance_breadcrumb($breadcrumb) {
  if (!empty($breadcrumb)) {
    return '<div class="breadcrumb"><span>'.t("You are here : ").'</span>'. implode(' › ', $breadcrumb) .'</div>';
  }
}

Can someone tell me why this seems to be truncated?

Perhaps you have an installed module, such as taxonomy breadcrumb, that is changing the $breadcrumb parameter. You might also check the page.tpl.php file to ensure it isn't getting modified there.