diff -r d0f775432705 Doc/library/fileinput.rst
--- a/Doc/library/fileinput.rst	Thu Jun 28 01:45:48 2012 +0200
+++ b/Doc/library/fileinput.rst	Thu Jun 28 12:21:04 2012 +0300
@@ -143,7 +143,8 @@
    sequential order; random access and :meth:`readline` cannot be mixed.
 
    With *mode* you can specify which file mode will be passed to :func:`open`. It
-   must be one of ``'r'``, ``'rU'``, ``'U'`` and ``'rb'``.
+   must be one of ``'r'``, ``'rU'``, ``'U'`` and ``'rb'``. ``'rU'`` and ``'U'``
+   modes are deprecated, unneeded in new code and will not be used in new code.
 
    The *openhook*, when given, must be a function that takes two arguments,
    *filename* and *mode*, and returns an accordingly opened file-like object. You
diff -r d0f775432705 Doc/library/functions.rst
--- a/Doc/library/functions.rst	Thu Jun 28 01:45:48 2012 +0200
+++ b/Doc/library/functions.rst	Thu Jun 28 12:21:04 2012 +0300
@@ -815,7 +815,7 @@
    ``'b'``   binary mode
    ``'t'``   text mode (default)
    ``'+'``   open a disk file for updating (reading and writing)
-   ``'U'``   universal newline mode (for backwards compatibility; should
+   ``'U'``   universal newline mode (deprecated; unneeded in new code; should
              not be used in new code)
    ========= ===============================================================
 
diff -r d0f775432705 Doc/library/subprocess.rst
--- a/Doc/library/subprocess.rst	Thu Jun 28 01:45:48 2012 +0200
+++ b/Doc/library/subprocess.rst	Thu Jun 28 12:21:04 2012 +0300
@@ -240,8 +240,7 @@
    When *stdout* or *stderr* are pipes and *universal_newlines* is
    :const:`True` then the output data is assumed to be encoded as UTF-8 and
    will automatically be decoded to text. All line endings will be converted
-   to ``'\n'`` as described for the universal newlines ``'U'`` mode argument
-   to :func:`open`.
+   to ``'\n'`` as described for :func:`open` with enabled universal newlines.
 
    If *shell* is :const:`True`, the specified command will be executed through
    the shell. This can be useful if you are using Python primarily for the
diff -r d0f775432705 Doc/library/zipfile.rst
--- a/Doc/library/zipfile.rst	Thu Jun 28 01:45:48 2012 +0200
+++ b/Doc/library/zipfile.rst	Thu Jun 28 12:21:04 2012 +0300
@@ -203,7 +203,9 @@
    the name of the file in the archive, or a :class:`ZipInfo` object. The *mode*
    parameter, if included, must be one of the following: ``'r'`` (the  default),
    ``'U'``, or ``'rU'``. Choosing ``'U'`` or  ``'rU'`` will enable universal newline
-   support in the read-only object. *pwd* is the password used for encrypted files.
+   support in the read-only object (deprecated; should not be used in new code;
+   use :class:`io.TextWrapper` for reading compressed text files).
+   *pwd* is the password used for encrypted files.
    Calling  :meth:`open` on a closed ZipFile will raise a  :exc:`RuntimeError`.
 
    .. note::
diff -r d0f775432705 Lib/_pyio.py
--- a/Lib/_pyio.py	Thu Jun 28 01:45:48 2012 +0200
+++ b/Lib/_pyio.py	Thu Jun 28 12:21:04 2012 +0300
@@ -63,8 +63,8 @@
     'b'       binary mode
     't'       text mode (default)
     '+'       open a disk file for updating (reading and writing)
-    'U'       universal newline mode (for backwards compatibility; unneeded
-              for new code)
+    'U'       universal newline mode (deprecated; unneeded for new code; should
+              not be used in new code)
     ========= ===============================================================
 
     The default mode is 'rt' (open for reading text). For binary random
diff -r d0f775432705 Modules/_io/_iomodule.c
--- a/Modules/_io/_iomodule.c	Thu Jun 28 01:45:48 2012 +0200
+++ b/Modules/_io/_iomodule.c	Thu Jun 28 12:21:04 2012 +0300
@@ -126,8 +126,8 @@
 "'b'       binary mode\n"
 "'t'       text mode (default)\n"
 "'+'       open a disk file for updating (reading and writing)\n"
-"'U'       universal newline mode (for backwards compatibility; unneeded\n"
-"          for new code)\n"
+"'U'       universal newline mode (deprecated; unneeded for new code; should\n"
+"          not be used in new code)\n"
 "========= ===============================================================\n"
 "\n"
 "The default mode is 'rt' (open for reading text). For binary random\n"