Index: boost/python/detail/caller.hpp
===================================================================
--- boost/python/detail/caller.hpp	(revision 65000)
+++ boost/python/detail/caller.hpp	(working copy)
@@ -52,7 +52,7 @@
 
 inline unsigned arity(PyObject* const& args_)
 {
-    return PyTuple_GET_SIZE(args_);
+    return static_cast<unsigned>(PyTuple_GET_SIZE(args_));
 }
 
 // This "result converter" is really just used as
Index: boost/python/suite/indexing/detail/indexing_suite_detail.hpp
===================================================================
--- boost/python/suite/indexing/detail/indexing_suite_detail.hpp	(revision 65000)
+++ boost/python/suite/indexing/detail/indexing_suite_detail.hpp	(working copy)
@@ -602,7 +602,7 @@
             else {
                 long from = extract<long>( slice->start);
                 if (from < 0) // Negative slice index
-                    from += max_index;
+                    from += long(max_index);
                 if (from < 0) // Clip lower bounds to zero
                     from = 0;
                 from_ = boost::numeric_cast<Index>(from);
@@ -616,7 +616,7 @@
             else {
                 long to = extract<long>( slice->stop);
                 if (to < 0)
-                    to += max_index;
+                    to += long(max_index);
                 if (to < 0)
                     to = 0;
                 to_ = boost::numeric_cast<Index>(to);
Index: boost/python/suite/indexing/vector_indexing_suite.hpp
===================================================================
--- boost/python/suite/indexing/vector_indexing_suite.hpp	(revision 65000)
+++ boost/python/suite/indexing/vector_indexing_suite.hpp	(working copy)
@@ -173,7 +173,7 @@
             {
                 long index = i();
                 if (index < 0)
-                    index += DerivedPolicies::size(container);
+                    index += long(DerivedPolicies::size(container));
                 if (index >= long(container.size()) || index < 0)
                 {
                     PyErr_SetString(PyExc_IndexError, "Index out of range");