When I went to my blog today, this appeared at the top of the page:
"Warning: Invalid argument supplied for foreach() in ../wp-content/plugins/avh-first-defense-against-spam/avh-fdas.client.php on line 444"
When I went to the developer's Web site at blog.avirtualhome.com/wordpress-plugins/ to send a message, I got this message:
"Fatal error: Call to undefined function exists() in /home/avirtu2/public_html/blog/wp-content/plugins
/avh-first-defense-against-spam/inc/avh-fdas.public.php on line 255"
Otherwise, it has been working great--really cut down on the spam comments.