I enabled logging: 21:19 GMT (London)
Error message: "An error occurred while attempting to play this video. Please try restarting both the Plex Media Server and this app".
I did both, and it doesn't help.
Logs: https://dl.dropboxusercontent.com/u/13997835/will not play quits/Plex Media Server.log
XML of media info: https://dl.dropboxusercontent.com/u/13997835/will not play quits/92.xml
Could it be related to this: http://forums.plex.tv/discussion/comment/1198434/#Comment_1198434