A bug I came across as a lawful evil character:
Brage, captain of the Amnian guard of Nashkel and notorious murderer, located south of the lighthouse, can either be redeemed or turned over to the guard, his mortal coil shuffled off in the latter case.
Upon meeting him, he will pose to you a riddle. Answering incorrectly will trigger a fight, whereupon his body will spawn and can be exchanged for a bounty in Nashkel. Answering correctly will allow you to escort him to Nalin at the Temple of Helm, where he will be forgiven rather than executed.
However, if one answers correctly and THEN chooses to kill Brage, his body does not appear, breaking the quest. I'm guessing the assumption by the developers was that, given the option, players would choose to deliver him to the temple, favoring the path of good, justice, and all that rot.
I bypassed this issue by using EE Keeper to materialize Brage's corpse, but it would be nice to see this fixed on behalf of all brutish ne'er-do-wells who happen to be accompanied 18-intelligence, riddle-solving Red Wizards of Thay.