[boost] ublas iterator problem

#include <boost/numeric/ublas/vector.hpp> namespace ublas = boost::numeric::ublas; void F () { ublas::vector<int> u (10); int y = *u.begin(); int x = u.begin()[0]; } This code fails to compile with g++34 + current boost.cvs. Test.cc:8: error: no match for 'operator[]' in 'boost::numeric::ublas::vector<T, A>::begin() [with T = int, A = boost::numeric::ublas::unbounded_array<int, std::allocator<int> >]()[0]' u.begin() should return an iterator, and the iterator should define operator[]. Why doesn't this work?