This is actually not a question, but a hack that might be useful to others.
I needed to remove the post title from the breadcrumb. Here is how i did it:
<!-- breadcrumbs: start -->
<?php if ( function_exists('yoast_breadcrumb') ) {
$opt = get_option("wpseo_internallinks");
$sep = ( isset($opt['breadcrumbs-sep']) && $opt['breadcrumbs-sep'] != '' ) ? $opt['breadcrumbs-sep'] : '»';
$breadcrumbs = yoast_breadcrumb('','',false);
$linksArr = split($sep, $breadcrumbs);
array_pop($linksArr);
echo '<nav id="breadcrumbs">'.implode($sep,$linksArr).'</nav>';
} ?>
<!-- breadcrumbs: end -->