If there is no fix for this problem, Arduino is nothing more than a flop. Pity, because the hardware is excellent.
The real bad thing here is the beginners who want to learn about this exciting world, encounter such problems, may give up because this is to difficult.
To Charbot: I think you have to choices, wait for a better driver or go for Netduino. Visual Studio (Express is free) is an excellent programming environment and you learn C#.
The drawback is C is used in the industry and you are locked to one platform (though mono is a way around) and M$ as well.
Wish you good luck!