This is RC1:
[16:07] ~/src/Python-2.5c1 $./python.exe -c 'from
test.test_tempfile import test_main; test_main()'
test_exports (test.test_tempfile.test_exports) ... ok
test_get_six_char_str
(test.test_tempfile.test__RandomNameSequence) ... ok
test_many (test.test_tempfile.test__RandomNameSequence)
... ok
test_supports_iter
(test.test_tempfile.test__RandomNameSequence) ... ok
test_nonempty_list
(test.test_tempfile.test__candidate_tempdir_list) ... ok
test_wanted_dirs
(test.test_tempfile.test__candidate_tempdir_list) ... ok
test_retval
(test.test_tempfile.test__get_candidate_names) ... ok
test_same_thing
(test.test_tempfile.test__get_candidate_names) ... ok
test_basic (test.test_tempfile.test__mkstemp_inner) ... ok
test_basic_many
(test.test_tempfile.test__mkstemp_inner) ... ok
test_choose_directory
(test.test_tempfile.test__mkstemp_inner) ... ok
test_file_mode (test.test_tempfile.test__mkstemp_inner)
... ok
test_noinherit (test.test_tempfile.test__mkstemp_inner)
... FAIL
test_textmode (test.test_tempfile.test__mkstemp_inner)
... ok
test_sane_template
(test.test_tempfile.test_gettempprefix) ... ok
test_usable_template
(test.test_tempfile.test_gettempprefix) ... ok
test_directory_exists
(test.test_tempfile.test_gettempdir) ... ok
test_directory_writable
(test.test_tempfile.test_gettempdir) ... ok
test_same_thing (test.test_tempfile.test_gettempdir) ... ok
test_basic (test.test_tempfile.test_mkstemp) ... ok
test_choose_directory (test.test_tempfile.test_mkstemp)
... ok
test_basic (test.test_tempfile.test_mkdtemp) ... ok
test_basic_many (test.test_tempfile.test_mkdtemp) ... ok
test_choose_directory (test.test_tempfile.test_mkdtemp)
... ok
test_mode (test.test_tempfile.test_mkdtemp) ... ok
test_basic (test.test_tempfile.test_mktemp) ... ok
test_many (test.test_tempfile.test_mktemp) ... ok
test_basic (test.test_tempfile.test_NamedTemporaryFile)
... ok
test_creates_named
(test.test_tempfile.test_NamedTemporaryFile) ... ok
test_del_on_close
(test.test_tempfile.test_NamedTemporaryFile) ... ok
test_multiple_close
(test.test_tempfile.test_NamedTemporaryFile) ... ok

======================================================================
FAIL: test_noinherit
(test.test_tempfile.test__mkstemp_inner)
----------------------------------------------------------------------
Traceback (most recent call last):
  File
"/home/mtebeka/src/Python-2.5c1/Lib/test/test_tempfile.py",
line 310, in test_noinherit
    self.failIf(retval > 0, "child process reports
failure %d"%retval)
AssertionError: child process reports failure 127

----------------------------------------------------------------------
Ran 31 tests in 1.077s

FAILED (failures=1)
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File
"/home/mtebeka/src/Python-2.5c1/Lib/test/test_tempfile.py",
line 665, in test_main
    test_support.run_unittest(*test_classes)
  File
"/home/mtebeka/src/Python-2.5c1/Lib/test/test_support.py",
line 441, in run_unittest
    run_suite(suite, testclass)
  File
"/home/mtebeka/src/Python-2.5c1/Lib/test/test_support.py",
line 426, in run_suite
    raise TestFailed(err)
test.test_support.TestFailed: Traceback (most recent
call last):
  File
"/home/mtebeka/src/Python-2.5c1/Lib/test/test_tempfile.py",
line 310, in test_noinherit
    self.failIf(retval > 0, "child process reports
failure %d"%retval)
AssertionError: child process reports failure 127

[16:12] ~/src/Python-2.5c1 $