twitter/bootstrap — pull request #526 by Josean1011 (2011-11-02 13:24:14+00:00)
Title: In the show class, is necessary append the new element to the document body

In the show class, is necessary append the new element to the document body only if it doesn't already exist. It fix the problem when the modal is used in a web that uses ajax navigation. With the actual code, when the user navigates, several modal duplicates elements are created in the document body.