- This was a regression introduced by 20dce2ce. Added check for undefined newActiveIndex so we can tell the difference between the URL not being found, and a zero index.
- Looks like the "Intelligent Guess" default behavior of the $.ajax() method in jQuery 1.5.1 guesses wrong when attempting to load an HTML file via a file:// URL. It's guessing that it is an XML document, so it ends up passing in the DOM document node to our success callback, instead of the expected HTML as text (responseText), so our callback code does not behave correctly. We can get around this by simply specifying dataType:"html" at the time we make a request.
- jquery.mobile.core.js no longer creates pages from every page and dialog in the DOM automatically at domready. Instead, pages are created as they are referenced via changePage, which can speed up pageload in multi-page documents, and means local "dialogs" referenced via data-rel="dialog" no longer need a data-role="dialog" attribute when served.
- in changePage, "from" is now allowed to be undefined. This simplifies the logic involved in showing the first page, which never had a "from" page, and previously needed a custom pageChange workaround to accommodate that.
- The pageshow event is no longer used as a callback for returning false and preventing the $.mobile.activePage from being set to the newly shown page. In other words, a page always becomes $.mobile.activePage once its shown now (the only reason this was optional before was because of a dialog restriction that's no longer true)
- the hashchange event logic for showing a particular page is now greatly simplified. It either shows the page referenced in location.hash, or if there's no hash it changes to the first page in the dom. This means every pageshow (including the first one) now uses pageChange internally.
- the hashchange event listener is no longer disabled when ajaxEnabled == false. Doing this before prevented local non-ajax page navigation from working properly. To disable hashchange listening, use $.mobile.urlHistory.listeningEnabled. We might consider defining (or moving) this on the $.mobile hash later as well for easier access.
- The internal var $.mobile.startPage is now $.mobile.firstPage, because it's not necessarily the page you started on, but merely a reference to the first "page" in the dom.
- Back buttons are auto-added to every page after the first one you first visit (this includes generated pages, such as those in a multipage document or nested listviews). Keep in mind that a "back" button does not take the place of a standard "home" link, and when building an app with jQuery Mobile, it's good to make use of both (particularly on deep-linked pages). Fixes#908
