Yesterday evening I kill 2 rats with my bare hands. 
This morning I can´t do any damage to a single rat but i can fight against klackers in an other dungeon. I went back to the sewers an try killing a rat without any sucess. 
So I went back again to the dungeon and attacked a klacker. It killed me because my dwarf stucked in front of a stairway

Now my Dwarf refuses to leave the tavern either before the bug is fixed or the beer runs out in Hydlaa

Starkiller