Simsane, there's nothing wrong with my 2 main families, and they've been going strong since launch day, and through new versions as well.
Xay and Bren,
I found that installing the new version and then not deleting my old families just wasn't fixing it for me, but I'm glad that it worked for both of you!
The biggest improvement in my game came from following Bren's advice to switch day to night. Now my peeps are doing great -- I even just had triplets in one family. Yay!