Index: boost/serialization/slist.hpp
===================================================================
--- boost/serialization/slist.hpp	(revision 61958)
+++ boost/serialization/slist.hpp	(working copy)
@@ -60,9 +60,11 @@
     ar >> BOOST_SERIALIZATION_NVP(count);
     if(std::size_t(0) == count)
         return;
-    unsigned int v;
+    unsigned int v = 0;
     if(3 < ar.get_library_version()){
-        ar >> boost::serialization::make_nvp("item_version", v);
+      boost::archive::version_type item_version(0);
+      ar >> BOOST_SERIALIZATION_NVP(item_version);
+      v = item_version.t;
     }
     boost::serialization::detail::stack_construct<Archive, U> u(ar, v);
     ar >> boost::serialization::make_nvp("item", u.reference());
Index: boost/serialization/hash_collections_save_imp.hpp
===================================================================
--- boost/serialization/hash_collections_save_imp.hpp	(revision 61958)
+++ boost/serialization/hash_collections_save_imp.hpp	(working copy)
@@ -22,6 +22,7 @@
 #include <boost/serialization/nvp.hpp>
 #include <boost/serialization/serialization.hpp>
 #include <boost/serialization/version.hpp>
+#include <boost/serialization/collection_size_type.hpp>
 
 namespace boost{
 namespace serialization {
@@ -35,18 +36,20 @@
 inline void save_hash_collection(Archive & ar, const Container &s)
 {
     // record number of elements
-    unsigned int count = s.size();
+    unsigned int c = s.size();
+    collection_size_type count(c);
     ar <<  BOOST_SERIALIZATION_NVP(count);
     // make sure the target type is registered so we can retrieve
     // the version when we load
     if(3 < ar.get_library_version()){
-        const unsigned int bucket_count = s.bucket_count();
+        const collection_size_type bucket_count(s.bucket_count());
         ar << BOOST_SERIALIZATION_NVP(bucket_count);
-        const unsigned int item_version = version<BOOST_DEDUCED_TYPENAME Container::value_type>::value;
+        const boost::archive::version_type item_version(
+                version<BOOST_DEDUCED_TYPENAME Container::value_type>::value);
         ar << BOOST_SERIALIZATION_NVP(item_version);
     }
     BOOST_DEDUCED_TYPENAME Container::const_iterator it = s.begin();
-    while(count-- > 0){
+    while(c-- > 0){
         // note borland emits a no-op without the explicit namespace
         boost::serialization::save_construct_data_adl(
             ar, 
Index: boost/serialization/collections_load_imp.hpp
===================================================================
--- boost/serialization/collections_load_imp.hpp	(revision 61958)
+++ boost/serialization/collections_load_imp.hpp	(working copy)
@@ -139,12 +139,13 @@
     s.clear();
     // retrieve number of elements
     collection_size_type count;
-    unsigned int item_version;
+    unsigned int item_version_val = 0;
     ar >> BOOST_SERIALIZATION_NVP(count);
-    if(3 < ar.get_library_version())
-        ar >> BOOST_SERIALIZATION_NVP(item_version);
-    else
-        item_version = 0;
+    if(3 < ar.get_library_version()) {
+      boost::archive::version_type item_version(0);
+      ar >> BOOST_SERIALIZATION_NVP(item_version);
+      item_version_val = item_version.t;
+    }
     R rx;
     rx(s, count);
     std::size_t c = count;
@@ -152,7 +153,7 @@
     BOOST_DEDUCED_TYPENAME Container::iterator hint;
     hint = s.begin();
     while(c-- > 0){
-        hint = ifunc(ar, s, item_version, hint);
+        hint = ifunc(ar, s, item_version_val, hint);
     }
 }
 
Index: boost/serialization/collections_save_imp.hpp
===================================================================
--- boost/serialization/collections_save_imp.hpp	(revision 61958)
+++ boost/serialization/collections_save_imp.hpp	(working copy)
@@ -41,10 +41,10 @@
     // make sure the target type is registered so we can retrieve
     // the version when we load
     if(3 < ar.get_library_version()){
-        const unsigned int item_version = version<
+      const boost::archive::version_type item_version(version<
             BOOST_DEDUCED_TYPENAME Container::value_type
-        >::value;
-        ar << BOOST_SERIALIZATION_NVP(item_version);
+        >::value);
+      ar << BOOST_SERIALIZATION_NVP(item_version);
     }
     BOOST_DEDUCED_TYPENAME Container::const_iterator it = s.begin();
     collection_size_type c=count;
Index: boost/serialization/optional.hpp
===================================================================
--- boost/serialization/optional.hpp	(revision 61958)
+++ boost/serialization/optional.hpp	(working copy)
@@ -38,8 +38,8 @@
     ar << boost::serialization::make_nvp("initialized", tflag);
     if (tflag){
         if(3 < ar.get_library_version()){
-            const int v = version<T>::value;
-            ar << boost::serialization::make_nvp("item_version", v);
+          const boost::archive::version_type v(version<T>::value);
+          ar << boost::serialization::make_nvp("item_version", v);
         }
         ar << boost::serialization::make_nvp("value", *t);
     }
@@ -56,7 +56,9 @@
     if (tflag){
         unsigned int v = 0;
         if(3 < ar.get_library_version()){
-            ar >> boost::serialization::make_nvp("item_version", v);
+          boost::archive::version_type vt(v);
+          ar >> boost::serialization::make_nvp("item_version", vt);
+          v = vt.t;
         }
         detail::stack_construct<Archive, T> aux(ar, v);
         ar >> boost::serialization::make_nvp("value", aux.reference());
Index: boost/serialization/hash_collections_load_imp.hpp
===================================================================
--- boost/serialization/hash_collections_load_imp.hpp	(revision 61958)
+++ boost/serialization/hash_collections_load_imp.hpp	(working copy)
@@ -21,6 +21,7 @@
 #include <boost/config.hpp>
 #include <boost/serialization/nvp.hpp>
 //#include <boost/serialization/collections_load_imp.hpp>
+#include <boost/serialization/collection_size_type.hpp>
 
 namespace boost{
 namespace serialization {
@@ -34,9 +35,9 @@
 {
     s.clear();
     // retrieve number of elements
-    unsigned int count;
-    unsigned int item_version(0);
-    unsigned int bucket_count;;
+    collection_size_type count;
+    boost::archive::version_type item_version(0);
+    collection_size_type bucket_count;
     ar >> BOOST_SERIALIZATION_NVP(count);
     if(3 < ar.get_library_version()){
        ar >> BOOST_SERIALIZATION_NVP(bucket_count);