Version 0.9.12.13.1464 was released almost a month ago (Sep 24th 2015): https://plex.tv/downloads/1/archive
This wasn't released to everyone until Oct 8th. I missed Elan's post about this.
A commit references this bug:
Date: Fri Oct 16 16:02:02 UTC 2015
New revision: 399485
multimedia/plexmediaserver: update to 0.9.12.13