Revision 36793 introduced a libc wrapper for FreeBSD 5.x which addressed some UTF issues. Unfortunately, this causes C compilation errors for certain ports.

Also reference issues 10910, 1455641

This change is no longer applicable for FreeBSD 9.  I'm not sure what version of FreeBSD made it not longer applicable, but there were reports of it still being necessary for FreebSD 7. FreeBSD 6 - 8 should be tested with this test script:
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#!/usr/bin/env python

from ctypes import *

cdll.LoadLibrary("libc.so.7")
libc = CDLL("libc.so.7")

assert libc.isspace(0xa0) == 0
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I've also attached a patch for python 2.7.3.