I love Jetpack Photon for the Retina-friendly thumbnails. However, it has shrunk the artwork on my Home page content. Its native size is 980x427 and Photon is shrinking it to a width of 640.
The Photon callout: http://i1.wp.com/lauraharden.com/wp-content/uploads/2013/07/homeart.jpg?w=640
I have deleted the original code and re-inserted it both as a generic img src callout and using the Media Uploader with Full size. Everything still loads the 640px.
Help!