Stone Block: At least 10 base damage, - Helmet PV, + Player total PV (yes, that means high PV = more damage) + some more based on randomness and danger level...
The "Player total PV" is added before a function is called that internally subtracts the "Player total PV" again before calculating the damage. It's working as intended (Thomas verified this).
I think stone block traps damage scale little too much with DL.
I had PC with 17 HP 28/6 (dv/pv (+ 1 pv metal helmet), good alertness + sixth sense and not cursed or doomed) he died on PC:3... trap did 18 dmg LOL :)