Hi!
we've been having some difficulty with filepages: when a new file is uploaded the filepage is only accessable while logged in. If I log out I can see the new file page in the list, find it in search and access the file itself from the last uploaded widget, but I get a 404 error on the file page itself (access permission is set to "everyone").
Thanks!
http://asif.co.il/
PS it looks like this fellow is having a similar problem:
https://wordpress.org/support/topic/file-pages-not-found-if-not-logged-in