If you have customized a SharePoint 2010 aspx page by using SharePoint Designer, you may experience that when opening the modified webpage in your browser, that a yellow bar below the navigation bar will appear. This is not actually a error. This is a warning message.
To resolve this, you can use one of the below steps.
First Way :
Add the Css in the master page.
<style type="text/css">
body #pageStatusBar{height:0px; font-size:0px; padding:0px; border-style:none;}
</style>
2nd Way :
The following style attribute to the first DIV:
<div id="s4-statusbarcontainer" style="display: none">
<div id="pageStatusBar">
</div>
</div>
3rd Way :
Add the below code in the head section.
<head>
<title></title>
<script type="text/javascript">
ExecuteOrDelayUntilScriptLoaded(hideWarning, "SP.js");
function hideWarning() {
var statusbarContainer = document.getElementById('s4-statusbarcontainer');
if (statusbarContainer != null) {
var messageSpan = document.getElementById('pageStatusBar');
if (messageSpan != null) {
if (messageSpan.innerHTML.indexOf('The current page has been customized from its template.') == -1)
statusbarContainer.style.display = 'inline';
else
statusbarContainer.style.display = 'none';
}
}
}
</script>
</script>
</head>
http://sanjeetsatpathy.blogspot.com/2013/01/the-current-page-has-been-customized.html