When you are using WordPress in a different directory than /wordpress, such as http://www.example.com instead of http://www.example.com/wordpress the suggest links are not working. The links are leading the visitor to http://www.example.com which will result in an 404 error.
To resolve this:
- Go to wordpress/wp-admin/plugin-editor.php?file=search-suggest/search_suggest.php
- Change this: $wpurl = get_bloginfo('wpurl'); into this: $wpurl = get_bloginfo('url'); on line 19 and 46.
- Save the file.
Good luck and cheers.