A new Android 4.1.2 Jelly Bean update has been released as promised for the Xperia S (LT26i), Xperia SL (LT26ii) and Xperia acro S (LT26w). Firmware build 6.2.B.0.211 is believed to fix a number of bugs in the first Jelly Bean release for the handsets (version number 6.2.B.0.200). The update appears to be rolling in the Middle East and Russia right now, but will hit other regions in due course. If you’ve had a chance to download the update, let us know if it’s more stable than the initial JB update.
Update: DooMLoRD has released a pre-rooted version of this firmware. You can find details here.
Thanks Aaron, Attila, bobeobi and skyend!