On initial install with a WooTheme (Canvas), this plug-in included itself in every thumbnail, featured image, etc all over the site, even when set to just posts. I had to pay a professional to make some changes within the code to get it to function properly. Now that the new update is out, it no longer works in Safari properly. The pin-it button actually shows up "floating" somewhere below the image and there's no transparency over the image on mouse-over anymore. It still functions in Firefox, though. This plug-in has been a thorn in my side since I installed it.