Miche Primato Cranks Unscrewing Themselves

ihatelaw Does anyone know how I can stop my Miche Primato cranks unscrewing themselves from their Miche bottom bracket/Miche bottom bracket unscrewing itself from BB thread?

Do you have both these problems or just the one? Cranks don't unscrew themselves. If the cranks are getting loose they weren't installed properly to begin with.
Were they greased lightly and tightened with correct torque?

As for the Italian threading: http://yarchive.net/bike/bottom_bracket_threads.html