To answer your Framerate Question.
Read this thread (it applies to SMP but, would also be relevent to the Play)
http://community.wdc.com/t5/WD-TV-Live-Streaming-Discussions/24p-playback-issues/td-p/536700
[Personally, i use 1080p 60Hz setting for my 23.976fps Mkv,Avi,Mov,Mp4,Wmv files which play fine… no stutter)