Another firmware analysis from cre.ations.net has shown that 1.1.3 has been changed significantly.
As you probably remember the previous firmware versions run application with root rights. On the other hand 1.1.3 runs application as mobile user rather then root. Another big difference is on the configuration files that have been placed on /var/mobile instead of /var/root. Moreover SpringBoard no longer requires SummberBoard for scrolling pages.
All this stuff means that 1.1.3 is ready for SDK apps; in others words it seems ready for official installable applications. This is a great news !! However if you try to launch Installer on 1.1.3 it shows the following output.
Next step probably will be find a hole grabbing the root rights..... Unfortunately this time I'm still waiting, doing nothing.