Finally found the post I was looking for:

https://medium.com/@izabelamelamed/not-seeing-the-star-cloud...

In my opinion it's a pretty damning conclusion. I would love to see some explanation from the ufology crowd :)

Thank you. Also mirrored at: https://archive.today/20250825091916/https://medium.com/@iza...

To summarize:

• All of these anomalous points of light only appear on one particular film emulsion, 103a-E (sensitive to red light)

• Said points of light do not appear with other emulsions used at the same time (e.g. 103a-F or 103a-O)

• Each plate made with 103x-E emulsion has a lot of these points of “light” all over them, which indicates there was an issue with the emulsion.

Some other links:

https://www.ufofeed.com/141549/some-serious-flaws-in-villaro...

https://www.metabunk.org/threads/transients-in-the-palomar-o...