1. Could you post the exception the next time you find it? I've been tracking this one down for a while.
3. I've heard about this one in the past. No idea what is causing it, honestly. Looks like it is improperly drawing a landmark sprite, but I've never seen it myself.
6. After 6000 turns, most screens wipe and reset themselves, so yes. Exceptions include your home base and any areas with quest important NPCs.
7. Yeah, that's a side effect from above. I'm trying to figure out a better way to store visited information without creating giant save files.
8. The amount of limbs dropped depends on your Butchery. I'm thinking of increasing the number, but reducing quality going forward though.
9. Butcher knife is an artifact item, so it is very rare. Rare items show up more frequently as the danger level increases.
10. You can have more than one head, so yes. Not sure why you would amputate your head when you only have one ;P
11. Skills aren't supposed to level up frequently. Their damage is impacted by your stats. Yes, using books is the fastest way to increase ability levels.
15. See 9. Rare items are only rare if they show up infrequently. Common items aren't removed from the pool.
16. They will if they notice you. Higher stealth characters can get multiple hits in before their target knows where the attack is coming from.
18. The Soldier doesn't call for help, so that would make sense. I'll do some more work on that.