Clean floor - Is this new????

I get it all the time outdoors since Seasons. I thought it was just that peoples' boots got muddy in the rain and snow. However, I might not be noticing it right away, so I'm not discounting the lightning stike.

I see this if the floor is dirty.. not just from a fire but anything that results in a dirty floor and it isn't new.

It's always been there, at least since GTW. I had it in a house that was used during a crime scene. The game didn't clean up the lot (dirty spots) when I moved in a Sim and she was able to clean up several dirty spots in the rooms before I placed furniture in a vacant lot.