Hi Erin,
First, I'm pretty sure Etsy mini doesn't work with Tumblr. I know for a fact it doesn't work with Wordpress, and I imagine Tumblr wouldn't be much different. I think the problem is that it is actually javascript, which is a different coding language than HTML.
Second, when you're posting your link, make sure it is just the basic link to the store. For example, when I click on my "shop" button, I get this: "
http://www.etsy.com/shop/belleenergie?ref=si_shop"When creating a link, all I really need is this: "
http://www.etsy.com/shop/belleenergie"Also, remember you are creating a new page on Tumblr, so be sure to add a title for it. For instance, my Tumblr URL is
http://belleenergie.tumblr.com/I have a page on my tumblr that is
http://belleenergie.tumblr.com/etsy(added Etsy on the end). Which is then redirected to my Etsy page. If you don't add a tag to the new page, everything gets very confusing.
Hope this helps!
Hayley