what's ur current rom?

all aosp rom no exfat support.
whats the big deal? format your sd card to fat32

If the apps are from Google Play originally, why worry about compatibility issue if you are restoring back to the same phone? The apps after restore should still work (and if you restore app+data, you should not have to do anything else at all...)

And if you are using Titanium Backup, you can backup and restore Android ID as well so even if apps are linked to that, you should be fine...

Edit: Only possible issue I foresee is if your new ROM is based on different Android versions like 4.1.1/4.1.2 and your backups are from 4.0.4)... but that is app compatibility problem right...?

you are not the only 1
most of us here also want to try 4.3

Well... I am not planning to use any 4.3 ROM (though SlimBean seems good)
But I would think that as long as those Custom ROMs have GApps installed working and tested, you should have no problems with App+Data restore. Maybe others who have specific 4.3 ROMS can pitch in with their advice 
So true... but I am more waiting for Kernel sources for Perseus kernel to be updated to be able to run 4.3 Samsung Stock (BUT if it does not ever happen, then no choice, have to choose a stable 4.3 ROM like dark_axl21) 

where got leak 4.3 ??
base on leak 4.2.2 then got

4.3 all are AOKP / AOSP

huh previously say november / december get 4.3 is for Canadian s3 and note 2
international version getting october ??

http://www.sammobile.com/2013/09/27/canadi...-3-in-november/

Hi there,i have an that S3 has been restarting non-stop(and can't detect sim card also) after it slipped and fell on the fall. I googled & still couldn't solve this "restart loop" problem. Got so frustrated at one point I just kept clicking onto the power button..i do not know how to solve this, any solutions other than sending it to the Samsung center?