Works in widget but not post

Hi Lester and thanks for your excellent plugin.

I’m having one problem… when users vote on a poll inserted into a POST the AJAX loading gif runs, but nothing else. No vote is not recorded.
Here is an example: http://www.cruiseoyster.com/vote-cruise-the-mediterranean-or-caribbean/

This does not occur if users vote on polls inserted into widgets.

I’ve check my theme has both wp_head and wp_footer tags.

Any help would be appreciated.

https://wordpress.org/plugins/wp-polls/