When clicking on the last thumbnail or scrolling through images in the lightbox, the last image fails always to load and just shows the text ‘loading media’.
I get the following javascript error: ‘event.returnValue is deprecated. Please use the standard event.preventDefault() instead.’
I have a testsite here where you can view the error:(http://www.utopiamultimedia.com/testsite/members/mattaitch/media/).
I have tried disabling all plugins and changing the theme to Twenty Thirteen, but no joy.