Installed it, I had massive slowdown during the first boss fight, the.. dark place full of water and ghosts is atrocious, I thought the game was going to die on me when the red dragon scorched me to death.
After getting off the elevator that goes from fireside shrine into undead chapel, i started running in the direction of the next bonfire when I noticed multiple bright projectiles coming at me. When I turned to see what was attacking me I saw a white crab-looking creature. It was pretty easy to kill and dropped some titanite. I'd made that run maybe 30 times but there was never a crab before and there hasn't been once since, although the lasercrab corpse is persistent even after visiting a bonfire. Anyone else been visited by a laser crab?