Current bugs in the goblin fortress:

1) This wall became indestructible after the newest patch. Magic, bows, swords, nothing works.
[Linked Image from 64.media.tumblr.com]

2) Spider bug. I killed the goblins that were guarding the spiders, and I was able to persuade the spiders to join my side. Everyone liked that, the spider left their cage. I didn't do anything to make them angry, but somehow they became hostile when I met them, and I was forced to kill them* (in the previous patches spiders did not attack me after leaving their cell).