If you have OFB replacing the trash can might not work as you cannot place anything beyond the sidewalk, even with moveobjects. You may have to move them out and back in again to reset the lot.
Is this the only cure for this problem? The last thing I want to do is move everybody out and in again, because of losing all the furniture and fixtures & fittings. I really do wish they would do something to enable us to leave those behind, I absolutely hate furnishing lots.
Actually, now I come to think of it, I don't think it would work, because I moved a couple of newly-graduated sims into a lot after installing the expansion and their lot behaved in exactly the same way. What I want to know is whether it's a glitch or deliberate.