We have setup our SharePoint 2013 site's navigation to be Term Store driven. As part of that, we have setup Term-Driven Pages to redirect the Friendly URLs to the actual pages.
However, when browsing to the friendly URL or clicking on the navigation link for the page, we immediately get the SharePoint 404 Not Found page.
I have read other forums suggesting this may be a bug with SharePoint 2013, but has not been fixed with an of the CUs so far.