Did the problem get worse after you filled the tank?

I have a 2006 SRT8 Magnum. If I top the tank off the car will buck and stall. The problem is with a valve on the top of the gas tank. It lets raw fuel into the evap system when the tank is full/overfull, then when the evap opens it dumps raw fuel and floods the car.

The first time this happened to me I filled up on a slow pump and by the time the pump kicked out my tank was past topped off. So far I've just been stopping at just over 3/4 full when I get gas, and haven't had anymore stalling problems. I got a letter form Chrysler, the problem is so common that they are extending the warranty on the tank and will replace it for free. I just haven't brought mine in yet.

I know this affects Magnums, Chargers, and 300s, but I'm not sure about Challengers or the specific year models.