This is doing my head in...

I have loaded this into my dev environment, and it works fine. I loaded into the test environment and I'm getting

ZEN_LIGHTBOX_COUNTER_IMAGE 1
ZEN_LIGHTBOX_COUNTER_OF 6

under the images in the lightbox instead of

Image 1 of 6

I've reloaded all the files in the install pack and checked that the file sizes are the same.

Can anybody provide some troubleshooting? Where is this referenced?

Cheers!