[meego]$/opt/org.python.python-2.7.2/bin/python -m test.regrtest ...
...
test_callback_register_double (ctypes.test.test_callbacks.SampleCallbacksTestCase) ... Segmentation fault

this is after a native (not cross-compile) configure; make; make install on armv7:
== CPython 2.7.2 (default, Jul 25 2011, 11:06:06) [GCC 4.5.1 20100731 (MeeGo 4.5.1-1) [release 4.5-2010.09-1]]
==   Linux-2.6.37-24.5.CE-adaptation-n900-armv7l-with-glibc2.4 little-endian
==   /tmp/test_python_6700
Testing with flags: sys.flags(debug=0, py3k_warning=0, division_warning=0, division_new=0, inspect=0, interactive=0, optimize=0, dont_write_bytecode=0, no_user_site=0, no_site=0, ignore_environment=0, tabcheck=0, verbose=0, unicode=0, bytes_warning=0)

that is the only regrtest seg fault, but there are several worrisome(?) failures in test_ctypes:
...
======================================================================
FAIL: test_longlongresult (ctypes.test.test_functions.FunctionTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/opt/org.python.python-2.7.2/lib/python2.7/ctypes/test/test_functions.py", line 167, in test_longlongresult
    self.assertEqual(result, 21)
AssertionError: 10L != 21
...
Ran 335 tests in 3.949s

FAILED (failures=17, errors=1, skipped=1)
test test_ctypes failed -- multiple errors occurred
1 test failed:
    test_ctypes
============

a few other test modules have failures, they appear to be less severe:
test_cmath 
test_float 
#http://bugs.python.org/issue12331
test_lib2to3 
test_math 
test_pyexpat 
test_strtod


=================
note: the arm systems i have access to (meego armv7 & android sl4a/py4a) both natively use python < 2.6.7; forgive my ignorance if 2.7 series is not expected to be mature on arm. please also forgive if i should have just disabled ctypes in setup.py as many of the online (cross-compile) instructions suggest:
disabled_module_list.append('_ctypes')
===============

test_ctypes for a native build of 2.6.7 does not seg fault, but does have the same test failures:
========
...
Ran 327 tests in 3.025s

FAILED (failures=17)
test test_ctypes failed -- multiple errors occurred
1 test failed:
    test_ctypes