Android 4.2 - Sound for video and apps permanently on mute
I've just upgraded my phone to a nexus 4 from a Samsung ace, and so with it got the brand new jeally bean 4.2. In the sounds menu there's 3 separate sound settings; alarms, ringtone and then music/video/games. The music/video/games option is set to mute and I can't work out how to turn it back on. Touching the mute icon doesn't work, dragging the sound slider doesn't work.
The rest of the sounds all work fine.