Hello,
the function has changed to have more options to configure the output in your templates index.php. There is no need of editing the function itself.
Default values if you call breadcrumbs in the index.php of your template:
<?php show_breadcrumbs(' » ', 0, true, -1, 'You are here: '); ?>
1.) = the seperator
2.) = how much levels (0 = all)
3.) = link (true mehas breadcrumbs are links, false breadcrumbs are only text)
4.) = depth (-1 = all)
5.) = title (here you can change the text)
Unfortunately with releasing 2.8.1 the devs didn't document the changes well. I hope they will write a doku abaout the new features and how to use them as soon as possible.
Matthias