When i turn redstone lamps on and place glowstone some chuncks around it don't update right. There also seems to be some lighting issues when i cover trees and leaves inside a dark room after growing them in sunlight, it seems to keep the lightsource block around it like there is glowstone around when there is not, and when i cover over a room with a roof it also leaves lighting glitches until it updates after a bit, and when i open a hole up it also does it sometimes.