Yesterday I updated my sgp321 to android 4.3 and there are many issues with it. -Camera modes available: Super auto, manual, panorama, picture effect. Sony promised us to have timeshift burst, AR effect, social live, infoeye on xperia tab z, z, zl, etc., aka smart social camera. Why don't I have them? I press add icon, it only shows other 3rd party apps not sony apps. -Screen flashes to fully black just for half a second every two seconds when the xperia international keyboard is open. -When watching youtube on fullscreen and I want to see the details by tapping the screen once, video lags for while, while tapping. This didn't happen before -When in chrome or chrome beta, if I press the home button, to go to another app, and I return to chrome, I see the page as fully black, but i see the chrome menu bar. If i just tap the screen once, the black goes away and webpage comes back immediately. -Stock calendar app doesnt show my exchange activesync calendars, it used to show on 4.2! -When side loading an app or uninstalling apps, it shows the progress on full screen and the progress bar cuts on the name of app and its just messes up! What the f.. Sony did? Messed up my tablet! I hate sony! New software update messed up my tablet. Also my sony tv had a fir,ware update and its messed up too. Thats it sony. I hate u now