Some new ICS firmware is now rolling out for the Sony Xperia P. New firmware version 6.1.B.0.550 looks like a minor upgrade over the existing firmware (6.1.B.0.544) and is a carrier customised version rather than generic. You can see a video of the firmware in action below, which shows it is VodafoneCZ firmware. There doesn’t appear to be much different, so it’s likely a bug fix release only.
Via xda-developers.