Err… Where is the reboot function in the power menu (long press power button) in Samsung Galaxy S II? No, there is no reboot function unless you install custom power menu like Advanced Power Menu. Besides APM, this update also bring along other goodies like CRT, SIP enabled on 3G and stock battery with % (1 to 100%) to Samsung Galaxy S2 with stock firmware.
Finally, I have reboot function in the power menu. And love the CRT effect. By the way, you need to install this update with ClockworkMod Recovery on Samsung Galaxy S2 in order to install this mod.
Download Advanced Power Menu for Samsung Galaxy S2 here.