[sparc, python2.6] test_replace_value_is_none: expected -100000000.00000 but got 0.00000

endianness issue I guess. Seems to happen only with python2.6 on that box:
http://nipy.bic.berkeley.edu/builders/pandas-py2.6-wheezy-sparc/builds/149/steps/shell_4/logs/stdio

`schroot -c wheezy` would bring you into that env (for anyone with access)
