JQuery Mobile Panel widget kills page

http://stackoverflow.com/questions/16755790/jquery-mobile-panel-widget-kills-page/16755947#16755947

HTML

<div data-role="page" id="mainPage">
    <!-- leftpanel1  -->
    <div data-role="panel" id="leftpanel1" data-position="left" data-display="reveal" data-dismissible="true" data-theme="a">

        <div class="panel-content">
            <h3>Left Panel: Reveal</h3>
            <p>This panel is positioned on the left with the reveal display mode. The panel markup is <em>after</em> the header, content and footer in the source order.</p>
            <p>To close, click off the panel, swipe left or right, hit the Esc key, or use the button below:</p>
            <a href="#demo-links" data-rel="close" data-role="button" data-theme="a" data-icon="delete" data-inline="true">Close panel</a>
        </div><!-- /content wrapper for padding -->

    </div><!-- /leftpanel1 -->
    <div data-role="content">
        <br /><br /><br />
        <a href="#popupLogin" data-rel="popup" data-position-to="window" data-role="button" data-transition="flow">Login</a>
        <br />
        <a href="#leftpanel1" data-role="button" data-inline="true" data-mini="true">Reveal</a>
        <a href="moreInfo" data-role="button">More Info</a>
        <br /><br /><br /><br /><br />
        New to 2Gen? <a href="#register">Sign up for an account.</a>
        <div data-role="popup" id="popupMenu">
            <div data-role="popup" id="popupLogin">
                <div data-role="fieldcontain">
                    <div style="padding:10px 20px;">
                        <h3>Please sign in</h3>
                            <input class="inputBox" type="text" id="loginUsername" value="" placeholder="Username">
                            <input class="inputBox" type="password" id="loginPassword" value="" placeholder="Password">
                            <br />
                            <div class="ui-grid-a">
                                <div class="ui-block-a">
                                    <input type="checkbox" data-mini="true" id="rememberMeCheckbox" name="rememberMeCheckbox">
        ...