My first ever contribution to this list after lurking for a couple of years:
I see many images on Commons that have replaced info
about the camera with info about the processing in Adobe tools. I don't know >where
exactly that camera metadata is getting stripped out, but I wish that it would be left
intact after processing in Adobe tools and >uploading to Commons.
From considerable experience uploading, it strikes me
that this is most common when you modify a file using Adobe software that has already been
processed by Adobe software on another computer. I do not know if this is deliberate on
Adobe’s part (or if so, what the reason would be) or a bug that no one’s cared to fix.