[nsxprime]

I solved it. I did have the files in the main photopost directory (I copied the contents of ./photopost/upgrades to ./photopost, which is why you still saw the ./upgrades folder).

However I needed to chown the upgrade*.php files. I uploaded them as root so root was the owner, but they needed to be owned by the account that runs Apache since they run through the web server.

Anyway thanks for the quick response and hopefully this info will help someone else who made the same mistake (or missed the same part of the instructions if it was in TFM)!