Of course this has to be something covered under warrantly. I've had my car 4 months and it smells like a wet dog with the a/c on or with only the vent on. There is something wrong with the build on certain cars for this to be happening. I've seen quite a few others with the problem in this car over on the Fusion Hybrid forum. I've never had this problem with any other car.
I've had my car in for serivce twice for this. Both times they said they sprayed the mold/mildew solution in the car (I believe it's Fridgi Fresh), only for it to come back the day aftrer I get my car back.
It is to the point where I can't have people in my car because I'm too embarrassed by the smell. I can't even take it myself, I have to drive without a/c or with the windows down in the heat.