breadcrumb problem at node level

Hi - I've added this module to an Aegir-based site (usernames should not be viewed) and in test it works except for one thing.

In the blog, specifically, once you get down to the node view the realname isn't showing in the breadcrumb.

The other levels of display are okay -- blog main page display, user blog posts page ... but not the node.

Could there be interference from pathauto, a theme problem, or maybe something to do with core blog?

Images attached. Any assistance appreciated.