The new build that's out tones down the immigration a bit as well as hopefully helping with drinking when there's a large population - they now share out multiple water barrels rather than all trying to go to the same one and finding it empty. So hopefully that sorts it for you, as I've seen another save that was working fine with a population of 300.
You said you toned it down, so I wonder how much immigration there was before.
The first groups were pretty manageable: 4 Dwarfs, then 11 and then 18. But the 2 next ones were huge: 41 Dwarfs followed by 37 Dwarfs the year after.
While I'm nowhere near having any supply problems (apart from constantly having to build more stockpiles, especially for tools, seeds, and foods), I can't keep up building bedrooms, especially since all wood was pretty far away, so getting enough wood for all these beds is pretty difficult.
Also, why can beds only be made of wood? And pillars not out of metal?
I think I'll put an extra cap on immigration of some percentage of the settlement population so it doesn't balloon up in size too quickly.
Even dwarves need some comfort and will only sleep on wooden beds! Metal pillars are an option although I'm moving away from metallic furniture unless it's going to be built out of pre-crafted components. Just hammering a bunch of ingots into a piece of furniture doesn't feel right. The next content update will include metal plates as an intermediate product required to build some kinds of metal furniture.
Great, thanks for the heads up!
Continuing with my village (and getting 41 Dwarfs again), I ran into another problem: My Dwarfs seemed to stopped refilling the barrels with water, and as a result everyone goes to the increasingly further away river to drink. I increased the amount of chefs to make sure they can refill them, but id doesn't do much yet. I guess a lack of buckets could be the reason.
I know that being able to tell the carpenter what to do is on the list of things soon to be included, so I think that will be solved soon. Just wanted to give you the heads up.