Just to let you know that since adding the Popup Ninja plugin, I got the following email. Worth knowing if you are considering buying this plugin. Googlebot can't access your site Over the last 24 hours, Googlebot encountered 8 errors while attempting to access your robots.txt. To ensure that we didn't crawl any pages listed in that file, we postponed our crawl. Your site's overall robots.txt error rate is 80.0%.