Anyway, i decided to take this chance to upgrade my Z1 to the latest Android release and the upgrade was done successfully, but i haven't really tested the camera issues. I did the upgrade using Sony PC Companion. For OTA users, you will have to wait further before it arrives on your phone.
Here are the notes from Sony's website:
- Android 4.4.4 including the latest enhancements and security updates from Google
- Updated and improved camera experience
- Improvements when using Google voice, Contacts, Music streaming and Google+
- The latest versions of our Sony apps for you to enjoy
- All of our latest bug fixes, optimisations & improvements