There was a slight error in the HTML causing the image to not load, which I've now fixed.

We used to use the wysiwyg in the "HTML Header" and "HTML Footer" sections of the themes, but I switched it to use Raw HTML as sometimes the wysiwyg caused problems if you wanted to do something clever/sneaky in the footer.

One option is to cut and paste the raw HTML page into a wysiwyg elsewhere on your site, edit it, then use the HTML Source button to get the HTML to paste back into the theme options. A bit of a faff but useful as it ensures that the HTML is valid

Thanks!

Joe