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Hi, This bug is still present in 0.8.0.dev5656: ====================================================================== FAIL: test_pbdv (test_basic.TestCephes) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/local/lib/python2.6/dist-packages/scipy/special/tests/test_basic.py", line 370, in test_pbdv assert_equal(cephes.pbdv(1,0),(0.0,0.0)) File "/usr/local/lib/python2.6/dist-packages/numpy/testing/utils.py", line 182, in assert_equal assert_equal(actual[k], desired[k], 'item=%r\n%s' % (k,err_msg), verbose) File "/usr/local/lib/python2.6/dist-packages/numpy/testing/utils.py", line 189, in assert_equal raise AssertionError(msg) AssertionError: Items are not equal: item=1 ACTUAL: 1.0 DESIRED: 0.0 A bug free testsuite is a very important item to advertise scipy in a industrial context. Could someone help me to kill this old bug? (ubuntu 64bits). Xavier