Detection, on 12 January 2013 - 02:45, said:
Did you clear cache and dalvik cache in CWM after flashing the ROM ?
Also check that there is not a newer version of Gapps available, some ROMs need updated versions
This. I've had a few crashes on first boot on of new ROMs because the cache and dalvik cache hadn't been cleared. Also, make sure you're using the correct version of gapps; there are two versions for Jelly Bean (one for 4.1.x, one for 4.2.x), make sure you have the one for 4.2.x (20121212). If that fails, try wiping and reflashing both the ROM and gapps.