The following example from 13.8 [temp.res] paragraph 4:
struct A { struct X { }; int X; }; template<class T> void f(T t) { typename T::X x; // ill-formed: finds the data member X // not the member type X }
is not ill-formed. The intent of the example is obvious, but some mention should be made that it is only ill-formed when T=A. For other T's, it could be well formed.