That is correct, I forgot about centipedes.
Here's more stuff I found in chapters 1 and 2
"1.2.1.1 Kranach, the raider lord"
It might be worth mentioning that 'g'iving Kranach's corpse to the sheriff seems to be the only way for this quest to end up in the final log's achievement list. Since said corpse only has a 10% chance of dropping, managing that is thus a matter of luck.
"1.2.3 Guth'Alak, the druid"
If the PC completes the Keethrax quest but only gets back to Guth'Alak after reaching level 30, the rewards will be lost forever. Ordinarily, this will never happen.
"as long as you avoid being hit by the black unicorns in some manner, you will not be corrupted while gathering corpses"
Black unicorns do not have a corrupting attack.
"1.3.1 Yergius, the master thief"
"A successful application of the skill will result in a stolen item being added to the PC's inventory, or the message "The -foo- does not seem to own anything valuable.""
The message is actually "the -foo- does not seem to own anything of value".
"1.4.4 High Mountain Village - introduction"
"It is possible to lure the Stone Giant Lord, and monsters in general, to the right side of the map, leave and reenter from the left."
If you can swim or create an ice bridge, you can also evade monsters by entering through a small opening in the north part of the moat, where water flows inside the village.
"1.6.1 Jharod, the healer"
If you already have the Healing skill and 'C'hat with Jharod after showing mercy, he'll give you a very rare stethoscope. If you already have Healing at 100, showing mercy and 'C'hatting to Jharod will yield a potion of ultra healing. There is no limit to how many potions can be obtained in this manner, potentially allowing the player to inflate maximum HP to very high values.
"1.7.1 Keethrax, the black druid"
"He is vulnerable to acid, webs and magic missiles"
Keethrax is immune to webs. He can however be stunned via the Stun Ray spell or the wand, paralyzed with a wand of paralyzation, and blinded with a cursed potion of invisibility.
The text also doesn't mention that his stats are variable, and directly proportional to your level when first entering DD:7.
"1.8 Puppy Cave"
"giant ants, always found on the second level. These are very difficult to kill for a low level PC and ideally should be avoided completely."
They can be easily killed if you bolt them with spells or wands. Their corpses will make the PC vomit and lose some satiation, but grant acid resistance, an otherwise rare intrinsic.
"2.1.1 Stone Giant Lord"
He doesn't see in darkness nor through invisibility, which may be used by the player to evade him.
"2.1.2 Hawkslayer, the burly adventurer"
"He will not equip these items after he is the PC's companion. The items must simply be dropped next to him before giving him the secret password. This behavior will probably change in future versions of ADOM."
This is intentional behavior due to how monster inventories work, confirmed by TB in the old bug tracker.
"2.1.7 Oracle"
"The most common use for the Oracle is to kill her for her corpse, which (...) may also increase Mana (+4)."
The only Mana increase available from eating the oracle is the low possibility of +1 Ma common to all spellcaster corpses.
"2.2 Infinite Dungeon"
"The level number is limited by some 32 or 64 bit integer value, but who really cares about that?"
I cared enough to check It's a signed 32-bit integer, thus making the 2147483647th level the "bottom" of the ID. Also, if you descend below I9999, the level counter in the status bar will read "I?", but that can only be done with hacking tools.
"2.2.1 Filk, the quickling bard"
"If the PC tries to wish for "Filk", lots of hostile quickling lords will be summoned instead."
The wish must be for a "quickling bard", not Filk.
"2.3.1 Bug Temple rewards"
"holy 2HS of devastation" should be "lawful two-handed sword of devastation".
"Breaking the center statue and the statue ten squares west + one north stops the breeding of the bugs and results in an appropriate line in the accomplishment list at the end of the game."
The statues are made of stone, and thus slightly vulnerable to fire, lightning and cold. Statues destroyed in this manner do not drop item rewards and are not counted as destroyed for stopping bug generation, so the player should be careful if using bolts or ball spells of those three elements.
"2.4.2 Kherab's quests and their rewards"
The rewards are inverted. Killing Guth'Alak gives you the shield of raw steel and killing Thrundarr gives you the amulet, not the other way around.
"2.5.1 Ancient Chaos Wyrm"
"The ACW is vulnerable to cold attacks (as are most of the monsters in the temple)"
The ACW has no particular vulnerability to cold or any other element.
"2.7.2 Underground level"
"The underground level of the dwarven graveyard contains a labyrinth which features many traps. It is very wise to have the Detect Traps skill while navigating this maze."
Or you can teleport directly on top of Griff's grave and back if you know the level's (static) layout.
"2.11.3.1 Assassin Prince"
If you'd rather not fight, zapping a wand of poison at the assassin prince will poison and eventually kill him without turning him hostile. This is probably a bug.
"2.12 Tomb of the High Kings"
"The PC must have a climbing set to reach it (and to leave that section of the map)."
Dropping your climbing set(s) in the staircase immediately before descending past the first level is a good idea, to prevent them from getting destroyed by traps/breath attacks and thus leave you trapped here until you find another one.
"2.15.1 Ratling dealer"
The dealer will ask for all your money in exchange for the climbing set if you have more than 50000gp, and that amount otherwise. You can drop your excess gold before 'C'hatting with him and he won't notice.
"2.17 Stone Circle"
"The doorway into the circle is guarded by two annihilators, who can annoyingly destroy the PC's equipment. Ideally the PC should be invisible and destroy them from a distance. The alternative should be to hit them as hard as possible with the best melee attack available."
Or you can use darkness.
Typos
"Combat staggering by applying First Aid or clening Ears." (cleaning)
"It may be usefull to learn spells, equip starting items etc." (useful)
"...and the PC will be cursed if it's not chaoticly aligned." (chaotically)