global site tags widget not showing lists to posts

Hello,

The global site tags widget on the front page of http://mybaderblog.net/ is displaying ok, but when you click on a tag it does not then show the list of posts.

I have tried:
- removing and re-adding the widget
- disabling/re-enabling the plugin
- deleting/re-uploading the plugin
- rebuilding the post index in the post-indexer settings.
- changing perma-link structure (bit of a punt)

I am running the latest version - 3.1.0.1

Thanks
Jack