Same for me after update. Wont play media files other than native recordings.(ET9000)I have the same issue since the last round of updates.. I'm now on 427 and no media files will play, was fine before.. Recordings are fine.
"Nothing to update" is my message when updating.
Build 433 does not play MP4 files, all other files are ok.
http://openpli.org/forums/topic/26565-mp4-playback-no-longer-working/