Like cs00102, I am also having a similar issue–a yellow warning sign and no activity nor statistics noted. I’ve not waited the requisite 24 hours, but I have checked footer.php to find <?php wp_footer(); ?> already there. I shall wait until tomorrow before commenting further on this matter. I did notice, though, that I am unable to select placement of this code in the header even though it is in the drop-down menu. It always defaults to the footer as noted. I find this curious.