I also have a problem with missing gravestones. I'll switch from one of my sims to another family member, then they or another family member will just die without notice or messege. So I'll use the dead sim's wife to go to the mausoleum to 'manage dead' so I can get their gravestone, but they aren't there. So i check their inventories and they aren't there. Then I search the neighborhood ground and nothing. I don't mind them dying without me there, but I would at least like their gravestone, I can't switch back and forth every night to check if they died. Is it just me?