--- libs\filesystem\src\operations.cpp	2012-06-18 07:40:58.000000000 +0100
+++ libs\filesystem\src\operations.cpp	2012-07-04 12:08:47.000000000 +0100
@@ -1758,13 +1758,13 @@
       return p;

 #   else  // Windows

       std::vector<path::value_type> buf(GetTempPathW(0, NULL));

-      if (buf.empty() || GetTempPathW(buf.size(), &buf[0])==0)
+      if (buf.empty() || GetTempPathW(static_cast<DWORD>(buf.size()), &buf[0])==0)
       {
         if(!buf.empty()) ::SetLastError(ENOTDIR);
         error(true, ec, "boost::filesystem::temp_directory_path");
         return path();
       }

--- libs\filesystem\src\unique_path.cpp	2012-03-26 08:44:24.000000000 +0100
+++ libs\filesystem\src\unique_path.cpp	2012-07-04 12:08:55.000000000 +0100
@@ -88,13 +88,13 @@
       else errval = 0;
     }
   }

   if (!errval)
   {
-    BOOL gen_ok = ::CryptGenRandom(handle, len, static_cast<unsigned char*>(buf));
+    BOOL gen_ok = ::CryptGenRandom(handle, static_cast<DWORD>(len), static_cast<unsigned char*>(buf));
     if (!gen_ok)
       errval = ::GetLastError();
     ::CryptReleaseContext(handle, 0);
   }

   if (!errval) return;
--- libs\filesystem\src\windows_file_codecvt.cpp	2012-03-26 08:44:24.000000000 +0100
+++ libs\filesystem\src\windows_file_codecvt.cpp	2012-07-04 12:09:18.000000000 +0100
@@ -37,13 +37,13 @@
     wchar_t* to, wchar_t* to_end, wchar_t*& to_next) const
   {
     UINT codepage = AreFileApisANSI() ? CP_ACP : CP_OEMCP;

     int count;
     if ((count = ::MultiByteToWideChar(codepage, MB_PRECOMPOSED, from,
-      from_end - from, to, to_end - to)) == 0)
+      static_cast<int>(from_end - from), to, static_cast<int>(to_end - to))) == 0)
     {
       return error;  // conversion failed
     }

     from_next = from_end;
     to_next = to + count;
@@ -57,19 +57,19 @@
     char* to, char* to_end, char* & to_next) const
   {
     UINT codepage = AreFileApisANSI() ? CP_ACP : CP_OEMCP;

     int count;
     if ((count = ::WideCharToMultiByte(codepage, WC_NO_BEST_FIT_CHARS, from,
-      from_end - from, to, to_end - to, 0, 0)) == 0)
+      static_cast<int>(from_end - from), to, static_cast<int>(to_end - to), 0, 0)) == 0)
     {
       return error;  // conversion failed
     }

     from_next = from_end;
     to_next = to + count;
     *to_next = '\0';
     return ok;
   }

   # endif  // BOOST_WINDOWS_API