Hi, I bought Photon five month ago and I did the update to 1.3.2 with no problem at all until I upgraded WPML to the latest version : sitepress-multilingual-cms 3.7.1, wpml-translation-management 2.3.1, wpml-string-translation 2.5.4, wpml-media-translation 2.2.0.
There I noticed a bug in all translated albums : All the Thumbs are showing as broken... (only on the admin, the front end is ok : http://pascalebeneteau.com/
I have opened a ticket on wpml's forum : https://wpml.org/fr/forums/topic/bug-daffichage-des-photos-dans-ledition-dalbums-traduits-du-theme-photon/
(sorry it's in french)
The ticket is saying that there seemes to be a problem between the custom post type of the albums in Photon and the plugin wpml-media-translation from version 2.1.23 onward...
The moderator is sending the détails of the problem to the "wpml compatibility team" and said that someone will contact you to disqus the problem with you.
On your forum I sadly noticed that your are ending the support for Photon. I know, evrery one wants to move forward to new projects ;-)
But then again from my point of view using Photon is a new and exiting experience, so if you could repair it one last time, I would be most grateful to you :-)
If you need to see the bug "live" I can grant you ftp and wp admin access to the staging site : http://pascalebeneteau.tk/