Share your experience!
i updated my phone's software to 4.3. the update fixed the problem i had before - if i didn't pause the music and took out headphones it would go into silent mode until reboot (factory data reset didn't help, so update was my last hope). but now when i record a video and camera is focusing it records this annoying ticking sound. it drives me crazy. it only started after i updated the software, so it must be a software thing. how can i make it stop? will it stop if i downgrade? it really bothers me, words can't describe how much it bothers me..
just did it, nothing changed 
In this case,you need to visit a sony service:
http://www.sonymobile.com/global-en/support/contact-us/
It is a bug in a firmware. Not a HW problem. Just wait for the new version maybe Sony will fix it.
I suggest you read this Thread from the XDA Forum :
http://forum.xda-developers.com/showthread.php?p=51004872
I'm on the .210 firmware now and the fact that up to the previous version (4.1.2 JB) this "ticking sound" was not present make me believe that Sony continues to do a bad development of the ROMs.
I'm really tired about this behavior ...