After upgrading to 0.38.2, all the buttons, volume slider and TTS option are gone:
Logfile contains the following but those lines were allways in the log and did not have any effect on the functionality before:
17-02-13 18:51:32 WARNING (MainThread) [homeassistant.core] Unable to find service media_player/turn_off
17-02-13 18:51:33 WARNING (MainThread) [homeassistant.core] Unable to find service media_player/play_media