I mentioned this at the factory yesterday because I have ordered a car with aircon.
The response: "Ah yes! Sometimes we get it wrong and it takes us a little while but now all the aircon condensers will be mounted the other way up and the tubes re-routed." or at least words to that effect.
It seems speed humps and other obstacles that would challenge even a mass produced car had taken toll of some units thereby alerting the factory that it was not such a good idea to mount the system so that the tubes were even lower that the Roadster sumps.

The only people unhappy with the fix are the spare parts department. Just kidding!