Finally I got my Wine environment sorted out - I'm now able to build superpack installers for both Python 2.5 and 2.6. I tested the 2.6 installer on Windows XP, and got a single test failure. This exact same test also is the only test failure with the numpy 1.3 installer on sourceforge. So the installer seems fine to me, and either it's the machine on which I'm testing or this test just fails on windows. What do other people see when using an installer from Sourceforge? For completeness: the installed version is SSE3, processor is Intel Core Duo P8700. ====================================================================== FAIL: test_special_values (test_umath_complex.TestClog) ---------------------------------------------------------------------- Traceback (most recent call last): File "C:\Python26\lib\site-packages\numpy\core\tests\test_umath_complex.py", l ine 179, in test_special_values assert_almost_equal(np.log(x), y) File "C:\Python26\lib\site-packages\numpy\testing\utils.py", line 437, in asse rt_almost_equal "DESIRED: %s\n" % (str(actual), str(desired))) AssertionError: Items are not equal: ACTUAL: [ NaN+2.35619449j] DESIRED: (inf+2.35619449019j) ---------------------------------------------------------------------- Ran 2342 tests in 8.000s FAILED (KNOWNFAIL=7, SKIP=1, failures=1) Cheers, Ralf