More bits and bobs:
First, the death+Olvar's bug only occurs when a starting character dies. Other party members recover at the end of the combat.
The game sometimes crashes in the barter screen, just as I place an item in one of the purchase slots. This can happen at any time - including a few minutes after loading. (once it happened three times after loading from the same save, but I was more concerned with playing than being sure what caused the error).
When I'm next bartering, I'll try to investigate more thoroughly.
[Edit: just to be clear, this bug is pretty rare - I can play for hours, and barter quite a bit without it happening.]
The speed stat of one of my main characters (female druid) now constantly displays as 24, when it should be 18. [24 decimal is 18 in hex: conspiracy
]
However, her speed is still effectively 18 for combat purposes at least - perhaps only the display is wrong.
This same character also seems to develop, then lose, armor skill for no good reason. She started with no armor skill, and has possibly gained one or two points in combat. However, sometimes her armor displays as 19, and sometimes doesn't appear at all.
I don't think I've ever added any skill to her armor by awarding skill points (half the time it doesn't exist anyway).
I can't really tell whether she gets the effects of the 19 armor, or not.
Attribute increase potions don't seem to work either. When a character takes one (I've tried at least the +3 speed one, and the +1str +1dex +1spd one) the increase is shown on their stat screen. However, the effects don't make a difference in practice, and going back to the screen (even after a few seconds) shows the attribute(s) having returned to normal.
The same is true for Winnifred's dagger (either unfinished, or partially finished). The speed increase shows in the stat menu (but this time never disappears), but makes no difference in combat.
Thinking about it, I think I've only tried this with the above druid so far - and her speed is already screwed (possibly because of the dagger??).
Another issue - when getting the first enchantment for the dagger, it was equipped, so the guy "took" it without actually removing it. After a day, I returned, and ended up with two copies of the dagger: one unfinished, one partially finished.
Perhaps the druid's speed got screwed up at this point - I don't remember, but I'll check if I've got a suitable save.
Also, in combat, a creature whose speed has been reduced to zero (or below??) shows up as having "Perfect" speed when examined. The behaviour is correct though - they act as if they've got 0 speed, rather than e.g. 25.
For the first round of combat, characters all have their full number of action points - regardless of armor penalties. For subsequent rounds things are as they should be.
Occasionally I get something like "Bad number of results in cond" showing up in the text display. I think this has only occured at the start of a random encounter - usually when fast travelling. Tauna is in our party, so that might have a bearing.
One last thing:
I dismissed Hyric (sp?) from the party and instructed her to wait at Kellen. I did this in a cave interior - the ones where the guy who stole the dagger from the Academy museum is hiding. When I arrived in Kellen, she wasn't there, and hasn't turned up since (I've been back a few times over a few days).
I'm guessing this is a bug [though in game I'm assuming she met a grim end on the way back to Kellen: the roads are being watched by evil folk after all].
Oh and out of interest, do brown cloth pants actually have 0-4 damage absorption, or is that a typo? Does the display info come from the same data as the combat system works from?
Either way, I guess it's an error, since they're only worth 1 drach.
That's about it.
I'll spend a few minutes trying to eliminate some of the vagueness, and get back to you.