On this page
http://aerogear.org/docs/unifiedpush/aerogear-push-ios/app-id-ssl-certificate-apns/
the text refers to
"Let’s start first by generating the Development Certificate. Click the Generate button on the Development SSL Certificate section:"
but the button in the screenshot (and in real-life) is labeled "Create Certificate..."
http://screencast.com/t/OeRUidF8ge