DTTG screen shots don't work on the ipad

I’m not sure if it is ironic or a sign of something bigger, but the screen shots of DTTG don’t appear to work on the iPad. :confused:

Ok I have figured it out. Don’t move the slider to select an image, just click the image to the right (or left) of centre and it makes that image active. I thought there should be a work around. :unamused: