Can anyone explain why the class member functions need their address taken when used in a boost::lambda::bind inside the class?

e.g.

vector<int> v;

MyClass theClass;

for_each(v.begin(), v.end(),

bind(MyClass::DoSomething, &theClass, _1));

//The above compiles fine, but…

class MyClass {

public:

            void DoSomething(const int& i) { … }

            void Go()

{

for_each(myInts.begin(), myInts.end(),

/*--------------------->*/         bind(MyClass::DoSomething, this, _1));

}

            vector<int> myInts;

};

The above code does not compile.  The marked line needs to be:

bind(&MyClass::DoSomething, this, _1));

Why?

Thanks.

            - Sean