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Xperia Z, ZR, ZL 4.3 Update Bugs
The purpose of this thread is to list any bugs or issues with the new update, please post a brief description of the issue.
Well i had the same problem-freezing screen,apps that didnt work,system error message... it seems that that the probem was this-i updatet the tablet via wi-fi and install it on the older version of android without reseting. The solution is:
1.You have to download http://www.sonymobile.com/gb/tools/update-service/
2.Install it,run it on your computer-choose the type of the device you`re using,it will show you that you have already the latest version of Android but it will have the butoon "Install".Install again the update,it will erase all old things on the tablet and your tablet will be clean and fresh.
It helps with me,i hope you too 
Glad that Sony Update tool worked for you. Too bad they don't offer a Mac version.
Well,i there is no flickering with the keybooard anymore,but i`m using Mozilla,i hope it will work with Chrome too. The only problem is that Shutting down is taking a longer time ....
This tablet was made to work or to have troubles with.
Im in front of my router and my tablet says "is not in range"
Im not going to resset this tabl;et is 1 week old ,something more 2014 ,need a way to use this **bleep**
tufn off bluetooth if it's on. Maybe it will help