sims are suddenly dying of starvation??

I don't have any mods, and I haven't had any particular hunger issues since the patch, but I finally played some over the weekend (I was worried about even opening the game last week), and all of my sims are crazy filthy, all the time. They will take a shower, get the hygiene bar to full green, and then one sims hour later, they're completely dirty again. They're not working out or doing anything particularly grungy; it happens even when they are doing things like sitting on the couch reading, sitting at a table doing homework, or using the computer.

Exhaustion has been a bit more of a problem, too, though perhaps not quite so much as hygiene. Again, while engaging in activities that are not at all strenuous.