The latest firmware that is certified on the PTCRB site for the Sony Ericsson Xperia arc is 3.0.1.A.0.138. This particular firmware was certified on 3 May, although as usual we are left to guess what may be included in this update compared to the current firmware (3.0.A.2.184).
However, judging by the screenshot below, it looks like that one thing it will bring will be Android 2.3.3, itself just a minor update over the current 2.3.2 that is on the Xperia arc and PLAY. Soon after we may even see SE release the latest Android version (2.3.4), which brings video calling and other bug fixes.
Via IT168.
