Warnings when adding new Taxonomy terms.

I get the following errors when adding a blog entry with a Taxonomy term that does not previously exist:

warning: mb_ereg_replace() expects parameter 3 to be string, array given in /public_html/sites/all/modules/pathauto/pathauto.inc on line 158.
warning: mb_ereg_replace() expects parameter 3 to be string, array given in /public_html/sites/all/modules/pathauto/pathauto.inc on line 158.

The URL alias for the blog entry, the taxonomy term, and the taxonomy term's feed are all created without issues.