Index: borland.hpp
===================================================================
--- borland.hpp	(revision 59329)
+++ borland.hpp	(working copy)
@@ -261,6 +261,12 @@
 #  define BOOST_NO_VOID_RETURNS
 #endif
 
+// When doing value-initialization, the bytes of the object may need to be
+// cleared (memset) before the object is constructed, because of a compiler issue:
+// http://qc.embarcadero.com/wc/qcmain.aspx?rc=51854
+// See also: http://www.boost.org/libs/utility/value_init.htm#compiler_issues
+#define BOOST_VALUE_INITIALIZATION_NEEDS_MEMSET
+
 #define BOOST_COMPILER "Borland C++ version " BOOST_STRINGIZE(__BORLANDC__)
 
 
Index: codegear.hpp
===================================================================
--- codegear.hpp	(revision 59329)
+++ codegear.hpp	(working copy)
@@ -159,5 +159,12 @@
 #  define BOOST_NO_VOID_RETURNS
 #endif
 
+// When doing value-initialization, the bytes of the object may need to be
+// cleared (memset) before the object is constructed, because of a compiler issue:
+// http://qc.embarcadero.com/wc/qcmain.aspx?rc=51854
+// Note: This issue is reported as fixed by build number 12.0.3140.16150
+// See also: http://www.boost.org/libs/utility/value_init.htm#compiler_issues
+#define BOOST_VALUE_INITIALIZATION_NEEDS_MEMSET
+
 #define BOOST_COMPILER "CodeGear C++ version " BOOST_STRINGIZE(__CODEGEARC__)
 
Index: gcc.hpp
===================================================================
--- gcc.hpp	(revision 59329)
+++ gcc.hpp	(working copy)
@@ -69,6 +69,15 @@
 #  endif
 #endif
 
+#if __GNUC__ < 4 || ( __GNUC__ == 4 && __GNUC_MINOR__ < 4 )
+// When doing value-initialization, the bytes of the object may need to be
+// cleared (memset) before the object is constructed, because of compiler issues:
+// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30111 (fixed for GCC 4.4)
+// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33916 (fixed for GCC 4.2.4)
+// See also: http://www.boost.org/libs/utility/value_init.htm#compiler_issues
+#define BOOST_VALUE_INITIALIZATION_NEEDS_MEMSET
+#endif
+
 #ifndef __EXCEPTIONS
 # define BOOST_NO_EXCEPTIONS
 #endif
Index: sunpro_cc.hpp
===================================================================
--- sunpro_cc.hpp	(revision 59329)
+++ sunpro_cc.hpp	(working copy)
@@ -75,6 +75,14 @@
 #define BOOST_NO_TWO_PHASE_NAME_LOOKUP
 #define BOOST_NO_ADL_BARRIER
 
+// When doing value-initialization, the bytes of the object may need to be
+// cleared (memset) before the object is constructed, because of a compiler issue.
+// Note: I do not know if this issue is there in all versions of the Sun compiler.
+// (Niels Dekker, 28 Jan 2010)
+// See also: http://www.boost.org/libs/utility/value_init.htm#compiler_issues
+#define BOOST_VALUE_INITIALIZATION_NEEDS_MEMSET
+
+
 //
 // C++0x features
 //
Index: visualc.hpp
===================================================================
--- visualc.hpp	(revision 59329)
+++ visualc.hpp	(working copy)
@@ -99,6 +99,13 @@
 #  define BOOST_NO_ADL_BARRIER
 #endif
 
+// When doing value-initialization, the bytes of the object may need to be
+// cleared (memset) before the object is constructed, because of a compiler issue:
+// https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=100744
+// See also: http://www.boost.org/libs/utility/value_init.htm#compiler_issues
+#define BOOST_VALUE_INITIALIZATION_NEEDS_MEMSET
+
+
 #if _MSC_VER <= 1500  || !defined(BOOST_STRICT_CONFIG) // 1500 == VC++ 9.0
 #  define BOOST_NO_INITIALIZER_LISTS
 #endif