WP-Shortstat stopped returning results

Strangely, the wp-shortstat plugin has stopped returning new results for the last 3 days. The recent referrers has not provided any new results in 3 days. Has anyone else experienced this before?

I reloaded fresh copies of the file and no help. I can’t think of any other changes to the blog except the installation of the WordPress MicroWiki plugin. Don’t see how that would affect it, though.