FS#630 introduced a bug which I had no time to completely trace but either its use in template.php is incorrect or the function itself. I believe in tpl_youarehere() (which it was the only one I checked) useHeading($page) is used but i think it should be something like useHeading('navigation'). As a quick hack I put a "return 1" in there and it worked for me. Please contact me if its not a good description. I have no experience in submitting bugs :-)