This is a patch for the v6.9.1. It already includes the previous patch v6.9.2. Thanks a lot to Ardanis for the thorough report.
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List of fixes:
v6.9.3
1. Dwarven Forge. Key-related area script block - fixed.
2. Ulcaster's dungeon. AR9801.are. Exit - fixed.
3. Halruaa's Mausoleum. Necromancer's test - modified to make it possible to leave the Mausoleum without reloading the game.
4. All Halruaa's tests. Now any NPC-mage - Aerie, Nalia or Kachiko (and sometimes Jan), - can accept the tests. Edwin also interjects, but in most cases refuses to test his own abilities.
5. The first level of Vale of Shadows. No more undetectable Death Trap.
6. Mirek's Quest. Fixed.
7. Ardanis, Denaini's Quest in SH to put priests' spirits to rest works fine. Please take a look into TT5201.bcs. In fact, there are exactly 25 Acolytes (9+12+4) having a DV = "SdElfAc". Don't count other priests, because they have a different DV.
8. Salamnder WTSALF14 is looking for Vera, and can find her on its own. It's not a bug, but a feature. You should run fast. If you are late, there is another, alternative way to go through this level.
9. Imoen's dialog sIMOENJ.d and sIMOEN2J. Fixed.
10. Ezekil's dialog. Fixed. The quest now can be completed in case you don't retrieve Kalinor's body. In case you do bring the body to him, he will grant you a new spell (fixed for use by Invokers).
11. Larrel's dialog DLARREL is OK. But anyway, I introduced some cosmetic changes into it.
12. Duvaine's Revenge. VPGUARD.cre and DUVGUARD.cre - changed to ENEMY.
13. Dar's new sounds (thanks a lot to Yiwei for providing his voice and for very professional recording).
14. Info Triggers in several areas - fixed.
15. "Some folks in Halruaa can comment on looting their chests even after death." - Ardanis, these are not comments of the folks but of Magical Wards, which are in fact some kind of magical devices.
16. Conlan's chest, TT2103. Now chest cannot be unlocked without a key. Also I modified Conlan's Hammer a bit to make it more formidable weapon. It is now 2d4+2 (+5 vs IGs).
v6.9.2 (included!)
1. Shar-Teel's leaving dialogue.
2. Two crashes when using Kuldahar's and Athkathla's portals.
3. Improper behavior of the frost giants.
4. Messed info strings in two areas of the Upper Dorn Deep.
5. Bad item in the hut near Kontik.
6. New script, which prevents looting the frost giant's stuff from their bags. Now, if they see the thief they will attack him/her.
Those, who play BGT, please install this patch after you complete BG1 portion of the game and before you move to BG2.