The hook_preprocess_node() implementation does not work on any pages showing more than one parent node (e.g. a view or taxonomy)

Because the module uses the $vars['id'] variable to only execute on the first pass of nodereference_variables_preprocess_node(), if there is more than one node on a page then it will never load the children of any nodes other than the first in the list.

Need to rewrite this with a custom counter to handle lists of nodes.