Subscribe link goes to new URL

When the "Display only a Subscribe link that makes the fieldset visible" option is set clicking the "Subscribe" link goes to entirely new URL that does not use Pathauto's clean URL. For instance if a forum topic's clean URL is "forum/test-category/test-forum-post" clicking on the "Subscribe" link brings the user to "node/NID/subscribe#subscribe" to display the Subscribe fieldset.

It would be better if the link simply called a JavaScript function that un-hides or adds the Subscribe fieldset on the page or some similar technique. This is also bad for SEO because the same content is at multiple URLs.