Sony is working hard to release the Android 4.1.2 Jelly Bean update across a number of 2012 Xperia handsets. The Sony Xperia P (LT22i) is expected to be updated from the end of March according to the official release schedule, therefore it is probably no surprise to see a leaked screenshot appear.
It shows the Xperia P on Android 4.1.2 running firmware build number 6.2.X.X.XXX, in line with what we expected. Interestingly, the kernel remains at version 3.0.8, rather than being updated to 3.4 like seen on newer handsets. However, as the pic is from a test ROM, there is a chance that the kernel may be updated before release.