Index: c-api/string.rst
===================================================================
--- c-api/string.rst	(revision 71891)
+++ c-api/string.rst	(working copy)
@@ -60,7 +60,11 @@
    *len* on success, and *NULL* on failure.  If *v* is *NULL*, the contents of the
    string are uninitialized.
 
+   .. versionchanged:: 2.5
+      This function used an :ctype:`int` type for *len*. This might require
+      changes in your code for properly supporting 64-bit systems.
 
+
 .. cfunction:: PyObject* PyString_FromFormat(const char *format, ...)
 
    Take a C :cfunc:`printf`\ -style *format* string and a variable number of
@@ -134,7 +138,11 @@
 
    Return the length of the string in string object *string*.
 
+   .. versionchanged:: 2.5
+      This function returned an :ctype:`int` type. This might require changes
+      in your code for properly supporting 64-bit systems.
 
+
 .. cfunction:: Py_ssize_t PyString_GET_SIZE(PyObject *string)
 
    Macro form of :cfunc:`PyString_Size` but without error checking.
@@ -202,6 +210,9 @@
    fails, the original string object at *\*string* is deallocated, *\*string* is
    set to *NULL*, a memory exception is set, and ``-1`` is returned.
 
+   .. versionchanged:: 2.5
+      This function used an :ctype:`int` type for *newsize*. This might
+      require changes in your code for properly supporting 64-bit systems.
 
 .. cfunction:: PyObject* PyString_Format(PyObject *format, PyObject *args)
 
Index: c-api/arg.rst
===================================================================
--- c-api/arg.rst	(revision 71893)
+++ c-api/arg.rst	(working copy)
@@ -276,14 +276,12 @@
    units in *items*.  The C arguments must correspond to the individual format
    units in *items*.  Format units for sequences may be nested.
 
-   .. note::
+   .. versionchanged:: 2.5
+      This format specifier only accepted a tuple containing the individual
+      parameters, not an arbitrary sequence.  Code which previously caused
+      :exc:`TypeError` to be raised here may now proceed without an exception.
+      This is not expected to be a problem for existing code.
 
-      Prior to Python version 1.5.2, this format specifier only accepted a
-      tuple containing the individual parameters, not an arbitrary sequence.
-      Code which previously caused :exc:`TypeError` to be raised here may now
-      proceed without an exception.  This is not expected to be a problem for
-      existing code.
-
 It is possible to pass Python long integers where integers are requested;
 however no proper range checking is done --- the most significant bits are
 silently truncated when the receiving field is too small to receive the value
@@ -403,7 +401,11 @@
 
    .. versionadded:: 2.2
 
+   .. versionchanged:: 2.5
+      This function used an :ctype:`int` type for *min* and *max*. This might
+      require changes in your code for properly supporting 64-bit systems.
 
+
 .. cfunction:: PyObject* Py_BuildValue(const char *format, ...)
 
    Create a new value based on a format string similar to those accepted by
Index: c-api/dict.rst
===================================================================
--- c-api/dict.rst	(revision 71900)
+++ c-api/dict.rst	(working copy)
@@ -143,7 +143,11 @@
    Return the number of items in the dictionary.  This is equivalent to
    ``len(p)`` on a dictionary.
 
+   .. versionchanged:: 2.5
+      This function returned an :ctype:`int` type.  This might require changes
+      in your code for properly supporting 64-bit systems.
 
+
 .. cfunction:: int PyDict_Next(PyObject *p, Py_ssize_t *ppos, PyObject **pkey, PyObject **pvalue)
 
    Iterate over all key-value pairs in the dictionary *p*.  The
@@ -187,7 +191,11 @@
           Py_DECREF(o);
       }
 
+   .. versionchanged:: 2.5
+      This function used an :ctype:`int *` type for *ppos*. This might require
+      changes in your code for properly supporting 64-bit systems.
 
+
 .. cfunction:: int PyDict_Merge(PyObject *a, PyObject *b, int override)
 
    Iterate over mapping object *b* adding key-value pairs to dictionary *a*.
Index: c-api/allocation.rst
===================================================================
--- c-api/allocation.rst	(revision 71891)
+++ c-api/allocation.rst	(working copy)
@@ -11,7 +11,12 @@
 
 .. cfunction:: PyVarObject* _PyObject_NewVar(PyTypeObject *type, Py_ssize_t size)
 
+   .. versionchanged:: 2.5
+      Prior to Python version 2.5, this function used an :ctype:`int` type for
+      *size*. This might require changes in your code for properly supporting
+      64-bit systems.
 
+
 .. cfunction:: void _PyObject_Del(PyObject *op)