Index: Lib/subprocess.py
===================================================================
--- Lib/subprocess.py	(revision 61420)
+++ Lib/subprocess.py	(working copy)
@@ -784,7 +784,7 @@
                 startupinfo.dwFlags |= STARTF_USESHOWWINDOW
                 startupinfo.wShowWindow = SW_HIDE
                 comspec = os.environ.get("COMSPEC", "cmd.exe")
-                args = comspec + " /c " + args
+                args = comspec + " /c " + '"%s"' % args
                 if (GetVersion() >= 0x80000000L or
                         os.path.basename(comspec).lower() == "command.com"):
                     # Win9x, or using command.com on NT. We need to
Index: Lib/test/test_subprocess.py
===================================================================
--- Lib/test/test_subprocess.py	(revision 61420)
+++ Lib/test/test_subprocess.py	(working copy)
@@ -654,7 +654,46 @@
             rc = subprocess.call(sys.executable +
                                  ' -c "import sys; sys.exit(47)"')
             self.assertEqual(rc, 47)
+            
+        def test_call_string_with_spaces(self):
+          # call() function with spaces in the command and parameter
+          temp = os.environ['TEMP']
+          exe = os.path.join(temp, "py thon.exe")
+          f = open(exe, "wb")
+          try:
+            f.write(open (sys.executable, "rb").read ())
+          finally:
+            f.close()
+          py = os.path.join(temp, "py thon.py")
+          f = open(py, "w")
+          try:
+            f.write("import sys\nprint sys.executable\n")
+          finally:
+            f.close()
+          p = subprocess.Popen(exe + " " + py)
+          p.wait()
+          os.remove(exe)
+          os.remove(py)
 
+        def test_call_args_with_spaces(self):
+          # call() function with spaces in the command and parameter
+          temp = os.environ['TEMP']
+          exe = os.path.join(temp, "py thon.exe")
+          f = open(exe, "wb")
+          try:
+            f.write(open (sys.executable, "rb").read ())
+          finally:
+            f.close()
+          py = os.path.join(temp, "py thon.py")
+          f = open(py, "w")
+          try:
+            f.write("import sys\nprint sys.executable\n")
+          finally:
+            f.close()
+          p = subprocess.Popen([exe, py])
+          p.wait()
+          os.remove(exe)
+          os.remove(py)
 
 def test_main():
     test_support.run_unittest(ProcessTestCase)