Share your experience!
Hi,
I got jelly bean update two days back. But today i found that there is a bug in walkman.
When i am hearing to a playlist and switch off the screen next song does't play.
And even i cannot change or resume play from notifacation bar.
And i can find the same problem when i want to change the song. I just turn on the screen with power button and i press the next button to play next song. Walkman stops and i have to go to walkman and start the song again.
Its really frustating.
Same problem i read in Xperia V
http://talk.sonymobile.com/thread/108491
and Xperia T/Tx
i dont have this kind of problem, walkman is awesome 
Try resetting the phone after the update, should do the trick.