I'm playing through BG for the second time, but this is my first time doing Durlag's Tower. Right after defeating the Demonknight, I ran into some pretty bad problems. I'm not using BGT or Tutu.

Ajantis died during the fight. I saved and went out of the room. After talking to Clair, I went back into the room to pick up Ajantis' equipment. It was nowhere to be found. I reloaded the save I had made right after the fight and guess what: the Demonknight was very much alive and the pre-battle dialogue started anew. My only option was to reload to a save made before the fight and go through it again. Once I had won, I left and headed back to Ulgoth's Beard. I met the cultists and after talking to Hurgan, went on to attack them in their house. I lost the fight with the cultists inside and reloaded a save made earlier in the inn. However, after reloading it's like Ulgoth's Beard reset itself! Talking to Hurgan yields his introduction, but if I talk to him a second time he tells me to hurry in stopping the cult. After leaving the inn, the entire town map is unexplored, Ike is right there, and guess who's waiting to teleport my party to some remote island.

However, if I use my auto-save from when I left the Durlag's Tower area and go to Ulgoth's Beard again, I meet the cultists as expected.

So... what's up with that?

EDIT : Using mods Unfinished Business and Widescreen.

Where do you have Baldur's Gate installed to?

Well, it's actually in a wineskin wrapper. Inside it goes Contents/Resources/drive_c/GOG Games/Baldur's Gate.

Well I know nothing whatsoever about MACs, but I will say that it sounds like your saves are not being written correctly. BG saves vital assets to the save files, and it sounds like the area files that should be updated and saved are not being. Not being a MAC user, I can't help you any further than that.

Well, too bad. As it turns out, Ulgoth's Beard is only reset in saved games made in Ulgoth's Beard. Leaving and saving outside is fine. But now that I've finished the quest and went back to Baldur's Gate, there is a similar problem there as well! I have to save out in the wilderness. That would make the endgame rather tedious... I actually tried replacing the area files from one saved game by those of another but it apparently doesn't help.