Array() on settings page

I have just installed the taxonomy_breadcrumb module and on going to the settings page for the module in the admin section the text 'Array()' is on the screen, with none of the options that you would expect to see for a module.

I have disabled taxonomy_context and taxonomy_access modules and I am still getting breadcrumbs so I presume it is doing something..I'd like to be able to configure it. Thanks