ToME: the Tales of Maj'Eyal

I've had two characters go to the Far East in the recent past, both alchemists. Both have encountered an invincible Doomed Shade in the Shadow Crypt. Namely, whenever an effect would damage it, a lua error appears and that effect does not take place (i.e. the skill doesn't get used, and time doesn't pass).

Link to save: http://dl.dropbox.com/u/5746454/Zolf__Kimblee.zip

same for me - ANY attack that can hurt my copy - lua error + no effect