Edit: Sorry, my bad, this is because of the latest Wordpress update. it only appears when I'm logged in. Just out of interest, does anyone know what it's for?
What looks like a block element has appeared at the top of the page (the beginning of the body) on my site. It seems to have the page background colour and appears over the top of the background image. Here's a screen:
Or you can just visit the site: http://eastasiastudent.net