Does the camera run smoothly? I still get the occasional camera app crash. No phone restarts for awhile now.

same case as mine. glad i wasn't the only 1 who got this issue 

what i did was i reset it to factory setting using this method:
1st remove & reinsert batt. push power button & volume down to boot the phone in safe mode.
while in safe mode, note that the available apps in this mode are only stock apps.
open backup & restore app, back up all your ESSENTIAL data only (i recommend these apps only = contacts, calendars, messaging, bookmarks, notes, email, whatsapp). DONT back up game data, trust me i've tried to back up game data so many times but always failed to restore the phone properly.
create ur backup file in ur sd card.
also connect ur phone to pc, move all your media files (pictir,songs,documents) from phone storage to sd card/pc.
then go to settings > backup & reset > factory data reset (remember, there's no turning back from this, so make sure to double-triple check making sure all ur essential data won't be wiped out)
factory reset ur phone, tick erase internal storage
after reboot, restore ur data then all will be well again... hopefully

it worked for me but i didn't bother with it anymore coz i got a new phone lol

and yeah i also suspect downloadable custom theme has got something to do with this 

yeah still got crash & home screen redraw here and there. but no restarts so far

I tried reboot in safe mode many times, still cannot get past the waving xperia screen.
Finally I used flash tool and flashed to stock firmware.
Phone has been working great. Finally. Now using 4.1. Scared to use 4.3 anymore..

Although I miss certain feautures of 4.3. Haha but I think will just stick with 4.1 at the moment until all the bug has been resolved.
Now my ram has 300++ mb free compared to when using 4.3 which left with less than 100MB...

I see, then no point for me to do factory reset. I was hoping you could share more XV 'rape' stories with us, but you already got your new baby the z1c so...
Is it 4.1.2 version 9.1.A.1.145?

Nope. 9.1.A.1.1.140. Central Europe.

I see. Everything working well so far? Camera, data connection etc?

I read that someone using SUS got downgraded to 4.1.2 on the Sony support forums. Wonder if it's true or even possible? 

Well, I'll go ahead and try to update via SUS tonight and see what happens.

Yup, working fine

If you all feel want to rollback to 4.1.2, why not download ftf file and flash it via flashtool. Not difficult and very easy. Once you have the ftf file, you can keep it in your hardisk and flashing that file was faster than PCC.

yeah, I'm planning to after trying the SUS update.

Is it ok to flash the 4.1.2 Singapore firmware on this page? http://forum.xda-developers.com/showthread.php?t=2648320
okay I think I'll wait for awhile since there an update released for Xperia T and TX.

http://www.xperiablog.net/2014/04/03/small...eria-tx-owners/

yeah, I'm planning to after trying the SUS update.

Is it ok to flash the 4.1.2 Singapore firmware on this page? http://forum.xda-developers.com/showthread.php?t=2648320
okay I think I'll wait for awhile since there an update released for Xperia T and TX.

http://www.xperiablog.net/2014/04/03/small...eria-tx-owners/

You think XP V will get another 4.3 improvement?

Previously I use that Singapore firmware. No problem at all. Currently using rooted 4.3 also download from XDA developers. Now I'm able to get back 12MP Superior Auto after root.

No high expectation but still hope they will fix the major bugs.
I see. Mind telling how you got the 12MP back? Are you on custom ROM?

If you have a rooted 4.3 JB, you can download an apk files and place it in system folder with correct permission. I also use Z1 email app on my device. What I like about rooting is I can delete/uninstall useless app and reduce RAM usage. I use this and 12mp Superior Auto

Previously I use that Singapore firmware. No problem at all. Currently using rooted 4.3 also download from XDA developers. Now I'm able to get back 12MP Superior Auto after root.

Sure no problem? I encountered few such as

1. Sometimes when answering calls, my loud speaker get activated automatically
2. Volume bar bug with downloaded theme
3. less than 100MB free ram
4. And just last week, my phone stuck in continuous loop boot.. Can't even boot with safe mode..
Solved by flashing with flash tool back to 4.1 jb..

I've been using this phone for the past 6 months without any problems, and it only took a month of using 4.3 update that it started giving me problem..
Hope Sony will release new update that'll fix all the bugs.. Or else we're forced to root and unlock BL

No high expectation but still hope they will fix the major bugs.

Bro...you are right....new updates coming soon.

UPDATES

Malaysia not yet... think they are slowly rolling it out.