So I installed the November CTP compiler for VS2012 express edition to play around with some of the new C++11 features and across an interesting bug. The code:

template <typename T, typename Alloc> template <typename... TArgs>
	typename List<T,Alloc>::Node* List<T,Alloc>::AllocateNode (TArgs&&... args) {
	uint64_t m;
	Node* n = Allocate<Node>(1,m);
	try { new (n) Node(std::forward<TArgs>(args)...); }
	catch (...) { Deallocate(n); throw; }
	return n;
	}

Makes sense, I think that would be ok for a temporary solution. Thank-you ;)

template  template 
   typename List::Node* List::AllocateNode (TArgs&&... args) 
   {
      struct Deleter
      {
         void operator () (Node* n) { Deallocate(n); }
      };

      uint64_t m;
      std::unique_ptr<Node, Deleter> n(Allocate(1,m));
      new (n.get()) Node(std::forward(args)...);
      return n.release();
   }