Here's an interesting one. I started a new family and had a sparse household. There were no real tables (too expensive!) and my ghost kept tidying plates. I wanted to use the ghost ability 'dispeller' [this ghost hack; buy a cheap hoover and empty the dirt on the floor] except that the ghost refused to drop all the plates she was holding, I could still dispell those dirty plates and her arm was broken, it also meant that no objects (bed, shower) were able to be used.
Also the ghost simology panel is taking longer and longer to load the closer I get to reaching the top ghost rank (currently about 45 seconds).