Two bugs in this 44.10 save.
First is a living Elk-man recruit hanging out with the zombie siege which has just arrived. This was something that was fixed in 44.06 as it seems to be one of the causes of zombies getting confused as to where they're supposed to be aiming their bloodlust. The 3 necromancers that came with the siege actually seem to head in the right direction independent of the zombies.

Second is two immovable scrolls stuck in the main entrance trap corridor. No matter what I do, I can't shift these unlike anything else brought by visitors, enemies and such.
Zombies should take a while to get to the fortress (if ever) so there's time to play with the scrolls.

Possible 3rd bug in that wildlife being animated by the siege actually starts fighting the zombies. That's kind of odd.

(modded world, various tweaked raws. No use of Dfhack)