Form display issue

Hi there
I have a form in Wordpress via a plugin - Contact Form7 that displays a strange message in IE after sending. In FF it displays the sent ok message on the page like normal and in IE is shows a blank page with a small box with a message like the attached image. What causes this?

website is www.gabrielemsmith.com

Thanks
Dotty

It looks like IE is failing (an all too common occurance) to understand parts of the JSON object that was returned from the form submission.

If nobody here can help you with this, I suggest that you make enquiries at the Contact Form7 forum.