Index: boost/utility/value_init.hpp
===================================================================
--- boost/utility/value_init.hpp	(revision 49991)
+++ boost/utility/value_init.hpp	(working copy)
@@ -8,6 +8,7 @@
 // 24 Dec 2007 (Refactored and worked around various compiler bugs) Fernando Cacciola, Niels Dekker
 // 23 May 2008 (Fixed operator= const issue, added initialized_value) Niels Dekker, Fernando Cacciola
 // 21 Ago 2008 (Added swap) Niels Dekker, Fernando Cacciola
+// 28 Nov 2008 (Fixed logical constness)
 //
 #ifndef BOOST_UTILITY_VALUE_INIT_21AGO2002_HPP
 #define BOOST_UTILITY_VALUE_INIT_21AGO2002_HPP
@@ -90,18 +91,25 @@
       wrapper_address()->wrapper::~wrapper();
     }
 
-    T& data() const
+    T const & data() const
     {
       return wrapper_address()->data;
     }
 
+    T& data()
+    {
+      return wrapper_address()->data;
+    }
+
     void swap(value_initialized & arg)
     {
       ::boost::swap( this->data(), arg.data() );
     }
 
-    operator T&() const { return this->data(); }
+    operator T const &() const { return this->data(); }
 
+    operator T&() { return this->data(); }
+
 } ;
 
 
Index: libs/utility/value_init_test.cpp
===================================================================
--- libs/utility/value_init_test.cpp	(revision 48425)
+++ libs/utility/value_init_test.cpp	(working copy)
@@ -260,7 +260,7 @@
   boost::value_initialized<T> const x_c ;
   BOOST_CHECK ( y == x_c ) ;
   BOOST_CHECK ( y == boost::get(x_c) ) ;
-  T& x_c_ref = x_c ;
+  T& x_c_ref = const_cast<T&>( boost::get(x_c) ) ;
   x_c_ref = z ;
   BOOST_CHECK ( x_c == z ) ;