Problem
If you are using long product names with multiple categories, the BreadCrumb will be very clumsy.
Solution
Replacing the Product Name as Product SKU will make the BreadCrumbs look much better.
In /includes/classes/class.product.php
Find
$GLOBALS['CatTrailName'] = isc_html_escape($this->GetProductName());
Replace
//$GLOBALS['CatTrailName'] = isc_html_escape($this->GetProductName()); $GLOBALS['CatTrailName'] = isc_html_escape($this->_prodsku);