The firmware has been released by Sony Asia (Click here).
Here is the improvement list:
1) Added support for auto-correction lens: Vario-Sonnar T * DT 16-80mm F3.5-4.5 ZA (SAL1680Z) and DT 16-105mm F3.5-5.6 (SAL16105)
2) Improved usability
3) Improved Quality
4) Improvement Response
If you have some time to test the new firmware let us know if you see some some REAL improvement! Thanks!