diff --git a/Build.py b/Build.py
index 8adba93..d810067 100755
--- a/Build.py
+++ b/Build.py
@@ -697,16 +697,26 @@ class TOC(UserList.UserList):
                 self.append(tpl)
     def append(self, tpl):
         try:
-            if not self.fltr.get(tpl[0]):
+            fn = tpl[0]
+            if tpl[2] == "BINARY":
+                # Normalize the case for binary files only (to avoid duplicates
+                # for different cases under Windows). We can't do that for
+                # Python files because the import semantic (even at runtime)
+                # depends on the case.
+                fn = os.path.normcase(fn)
+            if not self.fltr.get(fn):
                 self.data.append(tpl)
-                self.fltr[tpl[0]] = 1
+                self.fltr[fn] = 1
         except TypeError:
             print "TOC found a %s, not a tuple" % tpl
             raise
     def insert(self, pos, tpl):
-        if not self.fltr.get(tpl[0]):
+        fn = tpl[0]
+        if tpl[2] == "BINARY":
+            fn = os.path.normcase(fn)
+        if not self.fltr.get(fn):
             self.data.insert(pos, tpl)
-            self.fltr[tpl[0]] = 1
+            self.fltr[fn] = 1
     def __add__(self, other):
         rslt = TOC(self.data)
         rslt.extend(other)
diff --git a/doc/CHANGES.txt b/doc/CHANGES.txt
index 93b8e96..2478c65 100644
--- a/doc/CHANGES.txt
+++ b/doc/CHANGES.txt
@@ -3,6 +3,9 @@
 Changes since PyInstaller 1.3
 -----------------------------
  + Add import hooks for PyQt4 (thanks to Pascal Veret)
+ + Add fix for the very annoying "MSVCRT71 could not be extracted" bug,
+   which was caused by the DLL being packaged twice (thanks to Idris
+   Aykun).
 
 
 PyInstaller 1.3