Try logging out, clearing your cookies from cosplay.com and then logging back in again. Might be related to that.
Can you upload photos? Are you able to delete *any* photos? Can you try uploading one and then deleting it?
The "upgrade" was actually a downgrade.
The newest upgrades were horrible. Neat looking, but slow as hell for a large gallery. So we won't be upgrading anymore, just modifying the code to our own liking.
Anyway, let me know if it's still giving you problems and PM me a link to any specific photos that aren't working, if it's only specific photos.