My embedded pdf works here fine in Firefox, but in IE I just get the Google Reader box with no content.
Somehow the link is 'breaking' in IE - when I view the source, I see
<code><iframe src="http://docs.google.com/viewer?url=http%3A%2F%2Fwww.minors-on-tour.org.uk%2Fwp-content%2Fuploads%2FBookingForm2012.pdf&embedded=true" style="height:600px;width:570px;" class="pdf"></iframe></code>
As you can see, the slasshes are displayed properly in the Docs Viewer part of the URL, but the slashes are replaced with %2F elsewhere? Is that what's causing the problem in IE, or is it something else?