Not sure if this is intentional, but right now it's kinda hard to access a popbox image with right click. Here's what it currently displays:
This is caused by this little snippet of code:
<div class="es-photo-tag-viewport" data-photo-tag-viewport="" style="top: 0px; left: 464px; width: 612px; height: 459px;">
</div>
This is what it should ideally display upon right click:
This allows for easier sourcing of images and saving them.

When sourcing I have many cases where I don't want the original, the popbox displays the large which is perfect for many cases.