The "PHP tweaks" update to pkp-lib (commit #6a35da6) removes PKPFileDAO.inc.php.
./classes/issue/IssueFileDAO.inc.php (master) still references that libary, causing server errors when a issue galley is accessed.
Are you working with OJS 3.0.2 from the .tar.gz file, or from git?
Regards,Alec SmecherPublic Knowledge Project Team
From the git repo.
Also double-checked the current Github repo, and found the same discrepancy(ojs/classes/issue/IssueFileDAO.inc.php – line 17).
Are you using the same branch in both repos? Use git branch to check -- both in the OJS installation directory and in the lib/pkp subdirectory. It should be ojs-stable-3_0_2 for both.
Regards,Alec SmecherPublic Knowledge Projcet Team