I am the author of the original 2013 post. I cannot reproduce this with latest Plex Media Server 1.41.4.9463
root@plex:~# du -sh /tmp/
7.2M /tmp/
root@plex:~# ls /tmp/ | grep PlexCreditsDetection
Note that in my setup, /tmp is not tmpfs mounted, only /transcode, like this --mount type=tmpfs,dst=/transcode,tmpfs-size=32G,tmpfs-mode=1777
Did you try mounting /tmp without tmpfs and see if anything changes? Incorrect permissions come to mind for your /tmp mount.
