As we've previously mentioned, this update brings a few bug fixes and integration of Sony Ericsson's new Facebook tools and interface. Here's Vodafone's take on what's new:
A new maintenance release for the Sony Ericsson Xperia Arc is now available to our customers. This is an Android platform update to 2.3.3 and introduces a number of fixes and improvements, including:
Improved voice quality
Device stability improvements
Improvements to email setup and performance with exchange accounts
Security fixes and improvements
How will I get the latest software?
You can do this manually by connecting your handset to your computer via USB and opening the Sony Ericsson Update Service application. You will be prompted that an update is available and should follow the onscreen instructions.
Checking the software version:
To check which version of the software you have on your handset you need to dial *#*#7378423#*#* -> Service info ->Software info?.
The new software version will show as 3.0.1.A.0.145
The always pleasing to see Xperia Arc, now marginally even better. The announcement regarding the Xperia PLAY is here. Updates will be done via Sony Ericsson's desktop PC tool.
source: Eurodroid