We're rolling out some new protections over the course of the next few days aimed at helping to reduce favorites spamming and improving user experience.
Specifically, we're going to block iframing www.etsy.com from outside domains. This should only impact an extremely small subset of folks, and if you have no idea what an "iframe" is, it almost certainly doesn't affect you.
Before we begin blocking iframing, we're alerting anyone it will impact by making a small change that pops up a warning to members who are using iframing. If you see this alert and are using iframing (for example, using www.exampleshop.com to iframe www.etsy.com/shop/exampleshop) we recommend you instead do a 302 Redirect to bounce visitors of www.exampleshop.com over to www.etsy.com/shop/exampleshop. What this will mean for buyers is that if they do arrive at Etsy via a 302 Redirect, they won't meet with any unexpected lack of functionality.
Please post any questions or feedback in this thread.