1.16 worked fine with our Oracle database. When I either upgrade to 1.17 or just do a clean install of it, clicking on a forum results in:

Can't call method "fetchrow_hashref" on an undefined value at /export/home/httpd/cgi-bin/forum/admin/GForum/Forum.pm line 85.

Debugging shows:

GT::SQL::error = Failed to prepare query: '
SELECT *
FROM gforum_Post /*!32312 USE INDEX (p_rfl) */ LEFT OUTER JOIN gforum_User ON gforum_Post.user_id_fk = gforum_User.user_id
WHERE (gforum_Post.forum_id_fk = '2' AND gforum_Post.post_root_id = '0')
ORDER BY post_latest_reply ASC
' Reason: ORA-00933: SQL command not properly ended (DBD ERROR: OCIStmtExecute/Describe)