Any advice as to where I should look at and/or how to try fixing this?

~/python/CVS> ./python Lib/test/test_array.py **************************************** array after append: array('c', 'c') char array with 10 bytes of TESTFN appended: array('c', 'cThe quick ') char array with list appended: array('c', 'cThe quick abc') array of c after inserting another: array('c', 'ccThe quick abc') array of c converted to a list: ['c', 'c', 'T', 'h', 'e', ' ', 'q', 'u', 'i', 'c', 'k', ' ', 'a', 'b', 'c'] array of c converted to a string: 'ccThe quick abc' **************************************** array after append: array('b', [1]) array of b after inserting another: array('b', [1, 1]) array of b converted to a list: [1, 1] array of b converted to a string: '\001\001' overflow test: array('b', [-128L]) Traceback (most recent call last): File "Lib/test/test_array.py", line 137, in ? main() File "Lib/test/test_array.py", line 13, in main testtype(type, 1) File "Lib/test/test_array.py", line 132, in testtype testoverflow(type, signedLowerLimit, signedUpperLimit) File "Lib/test/test_array.py", line 25, in testoverflow raise TestFailed, "array(%s) overflowed assigning %s" %\ test_support -- test failed: array('b') overflowed assigning -128L

Look at b_setitem() in arraymodule.c. What is CHAR_MIN? Do you perchance have unsigned characters??? If so, let's just replace CHAR_MIN with -128 and CHAR_MAX with 127. --Guido van Rossum (home page: http://www.python.org/~guido/)