Double iframe here. Within the Facebook Canvas iframe, we're iframing another window to starbucks.com for our egifting section. Problem is, and what use to work, the paypal button will no longer break out of the iframes and render their page before being submitted and back into the iframes. Example, visit https://apps.facebook.com/starbuckscard/ and select paypal as an option when you get to it. This use to work ... any idea on why or what's broken/changed??? Any feedback much appreciated. Thank you.
All PayPal URL's will break out of iframes, or return an error depending on whether the browser adheres to X-FRAME-OPTIONS which is set for all pages (including Website Payments Standard) to SAMEORIGIN.
You'd want to use PayPal Website Payments Pro Hosted Solution instead, which allows itself to be embedded within an iframe.