In level 19 of original DK campaign, I have used the Sight of evil in a single dark block surrounded by impenetrable rock to see what there is and suddenly the game crash, I attach a savegame file to see that dark block but I must say that the crash isn't reproducible again... Weird.
NEW: Now I have a new savegame that REPRODUCES THE CRASH PERFECTLY, is the file called "fx1g0005.zip", the title in keeperfx is "sight of evil3". Use the Sight of evil over the dark block and it will crash sure. The difference with the first savegame I attached here "fx1g0007.zip", is that I have placed bridges slabs over other lava areas in the zone.