test_formatdate_usegmt (in test_email.py) fails if the environment 
variable LANG is set to a non-english locale.

Python 3.0rc1 on MacOSX 10.5.5

$ LANG=en_US.UTF-8 ./python.exe -E -bb ./Lib/test/regrtest.py -l 
test_email
test_email
1 test OK.

$ LANG=de_DE.UTF-8 ./python.exe -E -bb ./Lib/test/regrtest.py -l 
test_email
test_email
test test_email failed -- Traceback (most recent call last):
  File "/Users/martina/Downloads/Python-
3.0rc1/Lib/email/test/test_email.py", line 2139, in 
test_formatdate_usegmt
    time.strftime('%a, %d %b %Y %H:%M:%S -0000', time.gmtime(now)))
AssertionError: 'Sun, 05 Oct 2008 12:44:04 -0000' != 'So, 05 Okt 2008 
12:44:04 -0000'

1 test failed:
    test_email

I'm not able to reproduce this problem, and I would not expect to be
able to, since LANG should have no effect unless setlocale is called,
which the regression tests should not be doing without restoring it
afterward (and which the tests are not doing at all if you just run
test_email).

That said, I'm on linux, and issue 5125, which is also still open,
suggests this might be an OS X specific problem (maybe specific to
Apple's version of Python?).  Can you reproduce it with the python.org
version of 3.1?

Apple doesn't ship py3k yet. I observed the issue originally with my own build of 3.0 RC1 (No particular build settings 
were used, just ./configure ; make ; make test). It also happens with the build of Python 3.0.1 that is installed on my 
machine (this should be the official MacOS X build from Python.org), on MacOS X 10.6.2.

It doesn't happen with Python 3.1 anymore (and neither with 2.6.1 and 2.7 Alpha 1).

In that case, since 3.0 is no longer in maintenance, I'm closing this
bug as out of date.