Share your experience!
for led bar you can turn off light notifaction setting>display>light effects>turn off notifaction
and go for 3rd party apps like"illumation bar"for having notifaction
and for ram usage did you reset to factory after update?
Yes - that's been broken with the 4.3 update and will stay on during call as long as Light notifications are on.
http://talk.sonymobile.com/t5/Xperia-SP/LED-always-on-during-call-on-4-3/m-p/56462
So far two things:
- COMPLAIN in all possible ways to Sony - Facebook, emails, Twitter. Spam them with this. Hope they will fix it.
- Either turn off Light effects and use another app (in the asnwer above or from the topic in the link) OR press the lock key after call
Since pressing the Lock key turns the notificaiton off during call, I'm inclined to think it may be a bug so that the screen forgets to send Lights Off message on proximity detection.
Not only that, i just figured that the light effect in 4.3 walkman is over recognize the music volume which cause the music pulse stopped at 50%, sony need to fix that bug, its not cool anymore, the music quality is improved though!
i wish sony bring back recently added playlist too, it gone in the 4.3 update 
yes that one tv effects was really nice
hope it back on next update