Same issue, was doing an empty() check on $page_urlname in Admin:PageManager and not taking both main pages into account
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>{PAGE_NAME} • {SITE_NAME}</title>
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<link rel="stylesheet" type="text/css" href="{CDNPATH}/includes/clientside/css/enano-shared.css" />
<link id="mdgCss" rel="stylesheet" href="{CDNPATH}/themes/{THEME_ID}/css/{STYLE_ID}.css" type="text/css" />
{ADDITIONAL_HEADERS}
<style type="text/css" media="print">
span.normallink {
display: none;
}
</style>
</head>
<body>
<div class="pad"><div class="contentDiv">
<!-- BEGINNOT export -->
<div style="float: right;">
<span class="normallink"><a href="#" onclick="window.print(); return false;">print page</a> | <a href="{CONTENTPATH}{PAGE_URLNAME}{ADMIN_SID_AUTO}">view normal version</a></span> <image alt=" " src="{CDNPATH}/images/spacer.gif" id="ajaxloadicon" />
</div>
<!-- END export -->
<h2>{PAGE_NAME}</h2>
<div id="ajaxEditContainer">