Yes, it works just fine on the Kobo once the ncx is fixed.
The top of the file should look like this:
Code:
<?xml version="1.0" encoding="UTF-8"?>
<ncx xmlns="http://www.daisy.org/z3986/2005/ncx/" version="2005-1" xml:lang="en">
<head>
<meta name="dtb:uid" content="202cc276-dc77-4347-a8e1-1ec1cadec489"/>
<meta name="dtb:depth" content="1"/>
<meta name="dtb:totalPageCount" content="0"/>
<meta name="dtb:maxPageNumber" content="0"/>
</head>