Terminus Est

I decided to re-install and try another run, this time without SCS. After installing BG2, I checked NearInfinity to see the state of Irenicus' dungeon. Wouldn't you know it, Malaaq was already there in the vanilla dungeon without any mods applied. However, when I took a test character through the library, he did NOT appear. 

Can't be as bad as the bug I found last year - where Torgal's bodyguards wouldn't die. I abandoned that playthrough shortly after. At least that bug got fixed.

I always install "Pause all dialogues". Anyway I've long since left the dungeon and am currently building up enough levels and equipment to take on Firkraag.

Yeah, I don't mind so much the extra equipment. I can use them, sell them, or ignore them. Malaaq, however, initiates dialogue the instant he sees me. Since I'm still in combat in the library when that happens, it's damned distracting. Plus the djinn appearing outside the Plane of Air offends my sense of orderliness. As far as I can tell, the script that summons Malaaq when you click on his flask should still work so maybe I'll just delete him from the dungeon the next time I do a Trilogy playthrough.

According to Malaaq's DLG, he's supposed to hand over whatever he's carrying. The only thing he's carrying is the Sword of Chaos (no Varscona), which he gave me. The cambion (IDEMON01.CRE or IDEMON02.CRE) was also wielding the Sword of Chaos, which he duly dropped when I killed him.

I also checked the relevant ARE files. AR0602 (Irenicus' Dungeon level 1) has Malaaq hanging out just outside the library, exactly where I found him. Nothing happened when I clicked on Malaaq's flask, but that may be because I had already complete his quest by the time I entered the Plane of Air.