It's not exactly a bug per say, but when your daughters are born, they are put in the dungeon with the label "Newly Captured," which doesn't seem right to me. They are also born as slaves, regardless of whether their moms were slaves or not, and they have random starting happiness and health.
The label should read something like "Your daughter who has come of age." I think it is reasonable for them to inherit the slave/free status of their mothers (it just isn't logical that the daughter of a free woman would be born a slave). Their happiness should be dependent on the morality of the player or fixed at 100, as is normal for other girls just entering the player's care. Health should be at 100 as well.
Granted, all of the stats can change if the princess-maker-esque minigame for raising children ever makes it into the game, but for now I think this is a better approach.
[Edit]
Zodiac, I'm blaming the os your using for the games problems.
Sure...blame everything on Windows 7 >;o)
Also, I can confirm 'refusing to work' is still fubar. Slaves with -25 rebelliousness still work maybe once a year. If you're lucky.
I found that if you slap them with one or two of the rebelliousness lowering traits (meek, dependent, broken will, mind fucked), they will work almost all of the time (maybe refuse to work 1 shift every 5-10 weeks - still too high for someone with those traits and that low rebelliousness, but better than "normal").