How do I change the 'category home' url that is used in the category 'crumb trail' on the category pages

<div class="crumb"><%Links::Utils::format_title($title_loop, separator => $crumb_separator, no_escape_separator => $no_escape_crumb_separator, include_home => 1, link_type => 2)%></div>

By default this shows the website homepage url as http://www.********.com/index.html

I want it to read http://www.******.com

This is in reference to SEO Caononicalization & http://www.mattcutts.com/blog/seo-advice-url-canonicalization/

Thanks
Colin Thompson