spontaneous combustion? My sim Mama just caught on fire.... no rain, nothing on fire around her.... it was bizarre. Thank god her hubby was around to play with death.... why does this happen?
I assume you have Seasons. One of the new things you need to watch for is the Sims Temperature. If they get too hot doing an activity, they will burst into flames. Common causes are sitting in the hot tub during the summer, exercising on the treadmill outside (except maybe in winter), or even just fishing on a hot summer day.
LOL overheating sims can be a nuisance. I think I've been lucky not to have had any incidences of spontaneous combustion myself.