After the new update, I have a family where the two sims got married, but it keeps resetting, and they go back to "partnership." They have gotten married a few times now, and each time I get a new marriage certificate (they are all still all there), but they won't stay married, it resets to partnership the next day, every time. I'm nervous to go to any of my other families in case the same thing happens there, too.
Also, they keep dying of laughter. I've never, in all my years of playing, had Sims die of laughter this much. I pleaded with the Grim Reaper, brought one back, to have her turn around and die instantly again. Then her spouse died too. They won't stop dying of laughter.