in test_list.py, the following shows where it hit the memory leak:

[tony@hathi Python-2.5.2]$
LD_LIBRARY_PATH=/home/tony/src/Python-2.5.2/Lib/:$LD_LIBRARY_PATH
./python -v Lib/test/test_list.py
# installing zipimport hook
import zipimport # builtin
<<...>>
Python 2.5.2 (r252:60911, Jun 14 2008, 01:31:25)
[GCC 3.4.6 20060404 (Red Hat 3.4.6-9)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
# /home/tony/src/Python-2.5.2/Lib/unittest.pyc matches
/home/tony/src/Python-2.5.2/Lib/unittest.py
import unittest # precompiled from
/home/tony/src/Python-2.5.2/Lib/unittest.pyc
dlopen("/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/time.so", 2);
import time # dynamically loaded from
/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/time.so
# /home/tony/src/Python-2.5.2/Lib/traceback.pyc matches
/home/tony/src/Python-2.5.2/Lib/traceback.py
import traceback # precompiled from
/home/tony/src/Python-2.5.2/Lib/traceback.pyc
import test # directory /home/tony/src/Python-2.5.2/Lib/test
# /home/tony/src/Python-2.5.2/Lib/test/__init__.pyc matches
/home/tony/src/Python-2.5.2/Lib/test/__init__.py
import test # precompiled from
/home/tony/src/Python-2.5.2/Lib/test/__init__.pyc
# /home/tony/src/Python-2.5.2/Lib/test/test_support.pyc matches
/home/tony/src/Python-2.5.2/Lib/test/test_support.py
import test.test_support # precompiled from
/home/tony/src/Python-2.5.2/Lib/test/test_support.pyc
# /home/tony/src/Python-2.5.2/Lib/test/list_tests.pyc has bad mtime
import test.list_tests # from
/home/tony/src/Python-2.5.2/Lib/test/list_tests.py
# wrote /home/tony/src/Python-2.5.2/Lib/test/list_tests.pyc
# /home/tony/src/Python-2.5.2/Lib/test/seq_tests.pyc matches
/home/tony/src/Python-2.5.2/Lib/test/seq_tests.py
import test.seq_tests # precompiled from
/home/tony/src/Python-2.5.2/Lib/test/seq_tests.pyc
dlopen("/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/itertools.so",
2);
import itertools # dynamically loaded from
/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/itertools.so
test_addmul (__main__.ListTest) ... ok
test_append (__main__.ListTest) ... ok
Terminated

===========
in test_tuple.py, the following shows where it hit the memory leak:


[tony@hathi Python-2.5.2]$
LD_LIBRARY_PATH=/home/tony/src/Python-2.5.2/Lib/:$LD_LIBRARY_PATH
./python -v Lib/test/test_tuple.py
# installing zipimport hook
import zipimport # builtin
<<...>>
Python 2.5.2 (r252:60911, Jun 14 2008, 01:31:25)
[GCC 3.4.6 20060404 (Red Hat 3.4.6-9)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
# /home/tony/src/Python-2.5.2/Lib/unittest.pyc matches
/home/tony/src/Python-2.5.2/Lib/unittest.py
import unittest # precompiled from
/home/tony/src/Python-2.5.2/Lib/unittest.pyc
dlopen("/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/time.so", 2);
import time # dynamically loaded from
/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/time.so
# /home/tony/src/Python-2.5.2/Lib/traceback.pyc matches
/home/tony/src/Python-2.5.2/Lib/traceback.py
import traceback # precompiled from
/home/tony/src/Python-2.5.2/Lib/traceback.pyc
import test # directory /home/tony/src/Python-2.5.2/Lib/test
# /home/tony/src/Python-2.5.2/Lib/test/__init__.pyc matches
/home/tony/src/Python-2.5.2/Lib/test/__init__.py
import test # precompiled from
/home/tony/src/Python-2.5.2/Lib/test/__init__.pyc
# /home/tony/src/Python-2.5.2/Lib/test/test_support.pyc matches
/home/tony/src/Python-2.5.2/Lib/test/test_support.py
import test.test_support # precompiled from
/home/tony/src/Python-2.5.2/Lib/test/test_support.pyc
# /home/tony/src/Python-2.5.2/Lib/test/seq_tests.pyc matches
/home/tony/src/Python-2.5.2/Lib/test/seq_tests.py
import test.seq_tests # precompiled from
/home/tony/src/Python-2.5.2/Lib/test/seq_tests.pyc
dlopen("/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/itertools.so",
2);
import itertools # dynamically loaded from
/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/itertools.so
test_addmul (__main__.TupleTest) ... ok
Terminated


===========
in test_userlist.py, the following shows where it hit the memory leak:

[tony@hathi Python-2.5.2]$
LD_LIBRARY_PATH=/home/tony/src/Python-2.5.2/Lib/:$LD_LIBRARY_PATH
./python -v Lib/test/test_userlist.py
# installing zipimport hook
import zipimport # builtin
<<...>>
Python 2.5.2 (r252:60911, Jun 14 2008, 01:31:25)
[GCC 3.4.6 20060404 (Red Hat 3.4.6-9)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
# /home/tony/src/Python-2.5.2/Lib/UserList.pyc matches
/home/tony/src/Python-2.5.2/Lib/UserList.py
import UserList # precompiled from
/home/tony/src/Python-2.5.2/Lib/UserList.pyc
# /home/tony/src/Python-2.5.2/Lib/unittest.pyc matches
/home/tony/src/Python-2.5.2/Lib/unittest.py
import unittest # precompiled from
/home/tony/src/Python-2.5.2/Lib/unittest.pyc
dlopen("/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/time.so", 2);
import time # dynamically loaded from
/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/time.so
# /home/tony/src/Python-2.5.2/Lib/traceback.pyc matches
/home/tony/src/Python-2.5.2/Lib/traceback.py
import traceback # precompiled from
/home/tony/src/Python-2.5.2/Lib/traceback.pyc
import test # directory /home/tony/src/Python-2.5.2/Lib/test
# /home/tony/src/Python-2.5.2/Lib/test/__init__.pyc matches
/home/tony/src/Python-2.5.2/Lib/test/__init__.py
import test # precompiled from
/home/tony/src/Python-2.5.2/Lib/test/__init__.pyc
# /home/tony/src/Python-2.5.2/Lib/test/test_support.pyc matches
/home/tony/src/Python-2.5.2/Lib/test/test_support.py
import test.test_support # precompiled from
/home/tony/src/Python-2.5.2/Lib/test/test_support.pyc
# /home/tony/src/Python-2.5.2/Lib/test/list_tests.pyc matches
/home/tony/src/Python-2.5.2/Lib/test/list_tests.py
import test.list_tests # precompiled from
/home/tony/src/Python-2.5.2/Lib/test/list_tests.pyc
# /home/tony/src/Python-2.5.2/Lib/test/seq_tests.pyc matches
/home/tony/src/Python-2.5.2/Lib/test/seq_tests.py
import test.seq_tests # precompiled from
/home/tony/src/Python-2.5.2/Lib/test/seq_tests.pyc
dlopen("/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/itertools.so",
2);
import itertools # dynamically loaded from
/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/itertools.so
test_add_specials (__main__.UserListTest) ... ok
test_addmul (__main__.UserListTest) ... ok
test_append (__main__.UserListTest) ... ok
Terminated

==========

I commented out the following methods and reran the above tests. 
(the following only shows the starting line of each method, but I 
commented out the whole entire method)
Lib/test/list_tests.py: 226:    #   def test_append(self):
Lib/test/seq_tests.py: 248:     #   def test_addmul(self):

When I re-ran the three tests (test_list, test_tuple, test_userlist),
here is how they looked when I had to kill them:

(test_list)
# /home/tony/src/Python-2.5.2/Lib/test/seq_tests.pyc matches
/home/tony/src/Python-2.5.2/Lib/test/seq_tests.py
import test.seq_tests # precompiled from
/home/tony/src/Python-2.5.2/Lib/test/seq_tests.pyc
dlopen("/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/itertools.so",
2);
import itertools # dynamically loaded from
/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/itertools.so
Terminated


(test_tuple)
# /home/tony/src/Python-2.5.2/Lib/test/seq_tests.pyc matches
/home/tony/src/Python-2.5.2/Lib/test/seq_tests.py
import test.seq_tests # precompiled from
/home/tony/src/Python-2.5.2/Lib/test/seq_tests.pyc
dlopen("/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/itertools.so",
2);
import itertools # dynamically loaded from
/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/itertools.so
Terminated

(test_userlist)
# /home/tony/src/Python-2.5.2/Lib/test/list_tests.pyc matches
/home/tony/src/Python-2.5.2/Lib/test/list_tests.py
import test.list_tests # precompiled from
/home/tony/src/Python-2.5.2/Lib/test/list_tests.pyc
# /home/tony/src/Python-2.5.2/Lib/test/seq_tests.pyc matches
/home/tony/src/Python-2.5.2/Lib/test/seq_tests.py
import test.seq_tests # precompiled from
/home/tony/src/Python-2.5.2/Lib/test/seq_tests.pyc
dlopen("/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/itertools.so",
2);
import itertools # dynamically loaded from
/home/tony/src/Python-2.5.2/build/lib.linux-x86_64-2.5/itertools.so
test_add_specials (__main__.UserListTest) ... ok
Terminated

That is all the info I have time to get right now.  If I get time later
and no other instructions, I would try rebuilding without enable-dynamic
or enable-static in the ./configure options