Nodes without assigned vocabulary give error

Warning: Invalid argument supplied for foreach() in /web/drupal/modules/taxonomy_similar/taxonomy_similar.module on line 117

I'm getting this error when I submit the taxonomy_similar/node/nid (similar tags) page. My node-type doesn't have any taxonomy vocabularies assigned to it. So really the similar tags page shouldn't even be showing up.

In fact, the similar tags page shouldn't show up when submitting pages that may contain taxonomy vocabularies, but no free tagging vocabularies. Don't know how the module handles this now, but I thought I'd mention.

-Jeff