Sony has included fixes to problems encounterd especially when reading big SD cards. We're not sure what are the issues but there are more related to data connection and Bluetooth. The InTouch appas and Xperia Tip are also getting some updates and bug fixes as promised.
If you're currently running a Sony Concept firmware you should have seen the changes and improvements already. That Bluetooth crashing [roblem reported by some users have been fixed already. You can also expect better volume name on the large exFAT formatted SD cards and see minor bug fixes that will prove useful.
via : androidcommunity