Having completed my 0 kill attempt (2 kills too many, 1 unavoidable, 1 by mistake) some further observations (again, this is using the glitch described above):
*I never got hungry, my current health never improved by walking around or waiting (it did improve when I leveled up as normal), monsters never seemed to get added to a level if I hung around too long. Didn't pick up enough stuff to test if I could become encumbered. Weapon counts depleted properly when I used an arrow, for example. The best way to describe it is that time stood still in the game, but I was still able to travel through it.
*Traps all appear to work properly, including sleep and bear traps.
*Monster behavior: goblins(?) never went to protect treasure when I entered a room. Never attacked a slime, so I'm not sure if they divide. Never saw a message (based on the two monsters I intentionally attacked) about knocking an opponent back (not sure if there is supposed to be one - maybe there should be?).
*Endgame - Everything appears to work just fine. Score is properly posted on high score boards.