[Plugin: Sharebar] Undefined Variable

Trying to use this on a custom post type and the bars work in automatic but when I put it onto the template file it breaks. Only the vertical works.
This in my template:
<?php sharebar_horizontal(); ?>

Breeds this:

Undefined variable: str in /var/www/pope/wp-content/plugins/sharebar/sharebar.php on line 100

I would rather have the bar than have to call in each inidividually, which is what I am now doing.

http://wordpress.org/extend/plugins/sharebar/