As with other Safari users here I discovered today that my Web Clipper isn't working. Nothing happens when it's clicked. I reinstalled Evernote, and then tried to install the fix you had made, but Safari will not allow that extension to be installed. The Safari notification box reads: Safari can't install this extension. An error occurred while installing the extension "Evernote Web Clipper." I'm running the latest versions of Mavericks and Safari. Any advice is greatly appreciated.