Share your experience!
I've got another problem with camera after update to 6.2.A.1.100...
When I use Quick Shot/Launch camera - sometimes i get a message 'Error! Camera not available' 
The problem is ONLY when I use Quick Shot/Launch on locked screen. When I normaly turn on camera, by using 'Camera' app from menu, everything is ok.
I've tried repair phone by PCC but it does't fix my problem (or install fw Generic World or Central Europe).
On ICS, Quick Shot works perfect, but on 6.2.A.0.400 I've got another problem stated here:
http://talk.sonymobile.com/message/479145#479145
Sony, can you escalade my problem (try to several (maybe 5-6 times) Quick Shot/Launch the camera on locked screen and next lock screen)??
try this
settings > apps > all > camera > clear everything > restart your phone
open the camera > settings > select quick launch > uncheck it > settings > check quick launch try again, it should work
No, it's not work...
I found the topic with the problem similar to mine:
Any custom firmwares doesn't fix the problem 
I hope that Sony will fix camera problems in the next update and I will be able to use stock firmware 
Has anybody faced that problem?
May it be a hardware problem?
I have the same problem...
A week ago i've sent my phone to Sony Repair Center and today it is back.
On the 'repair report' I've got ONLY 'Software Update' (earlier I had 6.2.A.1.100 and now it's also 6.2.A.1.100) and of course problem still persists
Sony what can we (or you) do to fix it?????