Read around that troll handling (their falling on the ground when damaged) is better handled by ee. Is that true? And what are the differences with classical bg?
Just for completeness: were you perhaps referring about the fact that opcode #232 triggers once per round?
So basically trolls won't always fall unconscious instantaneously (worst-case scenario is when their HP get below 10 immediately after opcode #232 triggers, and you need to wait almost a full round before they fall unconscious).