You know those little dividers in fences that came with Pets? They don't work with apartments or trailers. It's not a big deal but I like to use them to divide dining and desk areas when I want an open look but don't want stupid sims reading at the table or desk. Worked great, until now. It's okay with houses so it must have something to do with apartment doors.
You don't suppose EA borked something else, do ya?