Paths containing 'http://' have the double-slashes stripped, resulting in corrupt URL at browser.

When using a token to generate a path, the resulting URL contains 'http:/' as with only a single slash. All browsers (other than Safari) interpret this as not containing the domain. So the browsers remove the colon and add the domain redundantly to the front of the URL, thus rendering it unusable.

The issue seems to center in the _custom_breadcrumbs_create_crumb_items() function of this module, which contains a preg_replace() command that removes all double-slashes indiscriminately. See below:
$original_path = preg_replace('/\/+/', '/', $original_path);

A better regular expression would only combine double-slashes that don't follow a colon:
$original_path = preg_replace('/[^:](\/\/+)/', '/', $original_path);