These bugs/quirks may have been suggested elsewhere... I've had time to read the second half of this massive thread and haven't seen them, but they could be in the first half. Apologies if so!
Trouble with cats!
Right near the start of the game there's a waypoint statue and near it some broken stairs leading up towards a "bridge" with crates on. After getting the teleport gloves its possible to access the crates by teleporting someone across the gap in the stairs. I've had a (repeatable) two-fold bug here:
(i) If I teleport someone across without unchaining them, then run the person on the bridge to the vine at the far end and climb down, the whole party magically appears together at the bottom (despite the rest of the party never having been on the bridge)! This isn't in any way game breaking... but is curious!
(ii) If the cat is following the party, it doesn't appear at the bottom of the vine! I have to go and find it again.
The second spot of cat-trouble I had is near the main entrance to the fort from the prison camp. With cat in tow, I went to talk to the guard on the left, and while we were talking he casually shot the cat while we chatted! I didn't get very far with the cat quest (it was following me and confused; having loaded from a pre-cat-death save, the cat followed me around for ages until somewhere getting lost/killed again, I didn't see where)... perhaps this is meant to happen, but it seemed a bit, well, disappointing if so as there was no warning. (The numerous cats and cat quests were one of my favourite parts of D:OS 1! Arhu is cool!).
