I've an application hosted on openshift for which I've added a Pinterest button. Unfortunately it doesn't work fully. When trying to use it, I get "Could not fetch the image" from Pinterest.
When I asked the Pinterest support, the answer was that openshift probably blocks requests based on the user agent string or requests from Amazon Web Services.
I haven't found any information about requests being blocked at all. Anyone knows anything about this?
Make sure you're using secure images when you create the Pinterest button. It sounds like you're trying to load non-secure images on a secure rhcloud.com subdomain.