I'm playing as Anorithil...when I got into Derth...it'll be normal for a short while, then the screen will got shifted SW with black borders on top and right with error:
Lua Error: /engine.Particles.lua:104: attempt to index a nil value
At [C]:-1 __index
At /engine/Particles.lua:104 loaded
At /engine/Particles.lua:34 init
At /engine/class.lua:38 new
At /data/zones/town-derth/zone.lua:73 foreground
At /mod/class/Game.lua:911
Why can't TOME 4 has a secret room where you can represent game bugs as, well, enemies you can crush like in Divine Divinity? That would be cool...