The only notable bug I've found in Planescape that the fixpack doesn't fix is that the harlots in the upper east part of the Hive (the area you enter after emerging from the mortuary or the tomb) aren't properly classed as being harlots. This makes it impossible to unlock the harlot NPC entry in the journal when you first talk to any of the harlots in that area and you have to talk to a harlot in another part of the hive to unlock the entry.
I was playing the unfinished business mod with the fixpack and tweak mods installed. However, I don't believe any of these mods are the problem since I don't think either of them affect the harlots in the upper eastern part of the Hive.
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