Oh geez, you’re right – I missed that part.
Okay, so the theme I’m using doesn’t have a header.php file I can get to, so I thought I’d just chuck it and try a new theme to see if the problem follows. It does. So, that probably means it has something to do with one of the two plugins I’ve installed? I’m using WordPress SEO and Sexybookmarks. Any experience with either of them doing this maybe?