After upgrading to .33c (fortress started in .33a), I got a Duchess and Duke Consort in an immigration wave. I already had a Duke and 2 Duchess Consorts, the first Duke having gone crazy after I failed to meet any of his mandates. It was mentioned as being fixed, but there seems to be a problem still.
Additionally, water with a depth of x that freezes may always come back with a depth of 7, regardless of what x was. I'm not certain that it is the case, but twice now I've noticed that one of my ponds (in which I had to salvage goblin goods after they noticed a thaw a bit late) has gained water during the winter. It is feasible that the water is coming from a source other than a freeze/thaw bug, though, as I don't pay much attention to the pond.
In addition to bugs, I also noticed that the Philosopher noble should probably officially require a room, as he complains about not having one if he isn't assigned one. Once the economy starts, he can't get one on his own because he doesn't work.
Edit: One more thing I remembered, migrant soldiers have a tendency to stay stuck on the edge of the map for a long time, compared to other migrants. If you deactivate them and wait for them to move a square off the edge and then reactivate them, they work fine. No clue what might be causing that.
And let me know if you want a save.
[ November 26, 2007: Message edited by: Densor ]