Samsung S4 recently upgraded to Android 4.3. Using November 30th, 2013 version. I pick the server and play the album and there is no sound. I can see the song indicator moving, but it quiet. I shut it down and use the Subsonic client and it plays fine.
I don't think so, but every once in a while someone has problems because of the EQ. I have no idea why to be honest. You might need to just move all the sliders to get rid of whatever defaults that got applied on the update.