Before the closing paragraph tag, all markup I include is briefly visible but disappears once the page is fully rendered. However, it remains visible in Source/Firebug.
I am using HTML5Boilerplate for this project and suspect there may be some code collisions that I have not yet identified.
<head>
<link rel="stylesheet" href="styles/normalize.css"/>
<link rel="stylesheet" href="styles/vendor/jquery.mobile-1.2.0.css"/>
<link rel="stylesheet" href="styles/vendor/jquery.mobile.structure-1.2.0.css"/>
<link rel="stylesheet" href="styles/vendor/jquery.mobile.theme-1.2.0.css"/>
<script type="text/javascript" src="scripts/vendor/modernizr-2.6.1.min.js">
</script>
</head>
<body>
<!-- The header vanishes post-rendering :( //-->
<div data-role="header">
Here goes the Head-Content
</div>
<h3>This content also disappears after rendering... </h3>
<!-- Content below this point stays visible! //-->
<div data-role="page">...</div>
</body>
...
<script type="text/javascript" src="scripts/vendor/jquery-1.8.3.min.js">
</script>
<script type="text/javascript" src="scripts/vendor/jquery.mobile-1.2.0.min.js">
</script>