Hi,
Sorry for the slight lag in replying. To generate the new key I:
1) Chose to use Facebook as the page I wanted to draw the feed/images from
2) Navigated to developers.facebook.com
3) Was instructed that I had to sign in using my personal account and not as the page
4) Signed in
5) Clicked on “My Apps” -> “Add new app” -> “website” -> “Skip and create App ID”
6) Filled in random display name, left namespace blank (optional), “No” to “is this a test version of another app”, “Apps for pages” category
7) “Create App ID”
8) Copy ID, clicked show on secret key and entered password again to show.
Hope that helps with solving the issue! My feed looks like the other user’s second feed (the one with the problem). Thanks for investigating the problem!