I really can't understand you guys...
If you have problems with one firmware use another one.
If KK doesn't work well on your device and you were perfectly satisfied with JB then use JB until Sony release new firmware which will maybe fix your problems.
As I said few times and I see I'm not the only one - 757 firmware is working great on my 6903.
But if I have problems on it I wouldn't whining all the time, I would flash firmware that works best in my phone and would wait for another firmware...
I know few guys who are still on 290 - they have best battery, camera and memory consumption on that firmware.
But we all want latest firmware no matter it's not working well....humans are strange beings.
I'm not saying Sony shouldn't fix it and we should be satisfied with JB, no, they must fix it but while you are waiting - use something that actually works for you...
Sent from my C6903 using Tapatalk
Holy words........