Somehow a bed got placed atop another bed. I managed to get the villagers to move the lower bed, but they ignore the higher bed. I’ve tried having them move it, having them undeploy it, but the floating bed stays where it is.
I’m guessing the problem is related to the floating table problem that cropped up in Alpha 4, but I see no solution for it. So far I’m just building more houses with more beds in them to get around the floater issue, but it is annoying.