Underwater glass base on a multiplayer server mostly lit by glowstone is appearing completely dark along a straight line with no smooth lighting (ie some of the glowstone along a certain border is emitting no light and the room goes completely lit to completely dark). Lighting effect also happens on lower levels underground. Sea cucumbers and sea lanterns are also affected. Hostile mobs are able to spawn in the darkness. Lighting seems to be able to be updated manually by placing torches and breaking them, though it only effects the area that the lighting of the torch affected. I played last night on the updated version with no issues. Logging out of server and restarting the game had no effect.