I'm not sure what you mean. Isn't nested hashes still a hash? To be honest it's not like I know exactly what I'm doing here. Not sure where else in rails this would have a bad impact. My motivation here was being able to access `flash[:success]` or any other `flash` key via symbols. Since this was able previously and rails now defaults to json serializer I would guess we do have a problem if you can't access all keys with symbols?