According to sammobile who brought this leaked:
A new firmware for the Galaxy S II is online.
This firmware based on Android 4.0.3 and got some new things.
This rom is still in beta/alpha fase but this one is looking really stable!
We of SamMobile can say: This rom is ready for daily use.
Samsung planned Galaxy S 2 updates in March
Some information about the firmware:
The firmware name is I9100XXLPB.
The date of build is January 29.
So only 4 days old!
We compared this rom with the latest ICS rom (I9100XXLP6)
Check below for all information plus some pictures and a small movie.
Some added features and changes of the I9100XXLPB ICS 4.0.3 firmware.
Changes we found so far…
Interface: Kind of 3D effect when scrolling.
Battery: Lots better than early ones.
Faster: Feels the same as LP6
Touch: Same as LP6.
Overall: Better score in our eyes than LP6 .
Facelock: Same as LP6 working fine.
Task: Same as version LP6.
Firmware details: I9100XXLPB
Model: GT- I9100
Android version: Ice Cream Sandwich 4.0.3
Kernel version: 3.0.15-I9100XXLPB-CL99600
Build Date: January 29, 2012
Stock ROM Download: http://hotfile.com/dl/144937425/4dd44e7/I9100XXLPB_I9100OXXLP5_OXX.rar.html
To upgrade your SGSII to this firmware, follow this Odin Installation Guide .