Hi
I have some issue using colorbox_js plugin with zenphoto.
The image displaying in gallery works just fine, as switch between image as weel.
But when I want to display a single image, I always get an error message:
This image failed to load.

I don't find any error message on apache or zenphoto log.
When I use Chrome devtools, the console shows some log (but I'm not sure it's related to the issue):
Resource interpreted as Image but transferred with MIME type text/html: "https://photos.martin.lc:8080/index.php?album=test&image=108.JPG".
Resource interpreted as Image but transferred with MIME type text/html: "https://photos.martin.lc:8080/index.php?album=test&image=105.PNG". Resource interpreted as Image but transferred with MIME type text/html: "https://photos.martin.lc:8080/index.php?album=test&image=03589202.jpg". Resource interpreted as Image but transferred with MIME type text/html: "https://photos.martin.lc:8080/index.php?album=test&image=03589202.jpg". Resource interpreted as Image but transferred with MIME type text/html: "https://photos.martin.lc:8080/index.php?album=test&image=108.JPG". Resource interpreted as Image but transferred with MIME type text/html: "https://photos.martin.lc:8080/index.php?album=test&image=035.PNG".
Zenphoto gallery available here
https://photos.martin.lc:8080/index.php?album=test

You have to use the iFrame content type on your colorbox js define as "https://photos.martin.lc:8080/index.php?album=test&image=108.JPG". is an image page and not an image. Or you have to change the link to link to the image itself. (Note this is a third party theme)
http://www.jacklmoore.com/colorbox/

Thanks for your answer.
Isn't there a way for zenphoto to display https://photos.martin.lc:8080/index.php?album=test&image=108.JPG as a direct link to the image ? and not the index.php file displaying the image embedded ?

It's not the index.php file that will be used but image.php in this case. There is a way of course but you probably will need to modify the theme (I am not familiar with it). See the Zenpage theme's image.php as an example.

Disabling hotlinking seems to fix the issue, full image is now displayed as expected.