This time around, I didn't experience the bugs with the game crashing once I killed Hedrack and then tried to visit anywhere but the Temple and Nulb (so I actually got to collect the rewards from Sargen and Thrommel).
However, with this game, if a set of stairs isn't always visible and clickable, they would not appear for me. So even if there was a clickable door that revealed them, I could do so and get the animation of the door/wall opening, but the stairs would not be there.
Examples: the secret door in the first dungeon level where all of the undead are - that leads to the spiral staircase. I also could not access the secret stairs in the Temple.
Other exampls: the stairs east/southeast of Falrinth and Smigal. So no shortcut from the burned farmhouse to Temple level 2
The secret stairs next to the ogre in the Moathouse that let's you surprise the bandits - also not there. Ditto for the one by the ghouls in the moathouse.
Lucikly, this just resulted in additional walking rather than preventing me from finishing the game.
Other than that, the only consistent crash bug was having Sargen in the party when trying to kill the fire elemental boss. Each time the balor died, the game crashed. So I had to return to the surface and have Sargen leave before I could return to kill the Balor and unlock the last level.
