idn't want to wait for Apple to release 10.8.3's kernel source code, so I decided to modify the new kernel instead. Works great with Mountain Lion 10.8.3 on HP laptops with i3, i5, and i7 processors. If you had to use a lapic kernel before, then this should work with your system.
Just replace existing mach_kernel or put in /Extra/ and add this to org.chameleon.Boot.plist:
Unlike previous lapic kernels, this one lets you log into iCloud, FaceTime, use Dictation, etc. I guess it has to do with the time stamp or something. Enjoy