Do you have skype or something so we can screen share and I can show you my fort so maybe you can help me get through it?
Edit: They just vanished, what happened?
They probably thought that the siege was a waste of their effort and left.
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Anyway, I spend ages this morning finding out what monsters I don't want to meet in adventurer/fortress (using the arena thing).
Got 6 humans and one goblin (goblin under my control) with G.M hammerman and G.M dodger, equipped with iron breastplates, iron greaves and iron mauls. I put that lot up against a single UNSKILLED hydra, and the result:
Two Notable Kills
Human 8 the human
Goblin 1 the goblin (me)
Five Other Kills
Five humans in the Arena
I never want to see a hydra for real. Never.
On the other hand, it did lose 4 necks and bleed to death after I left control mode and unpaused the game.