ae63ebf  broke test suits
ae63ebf77b355591413f15bf77d30943e9f957b

FAIL: testWLS (pandas.stats.tests.test_ols.TestOLS)
 Traceback (most recent call last):
  File "/home/user1/src/pandas/pandas/stats/tests/test_ols.py", line 92, in testWLS
    self._check_wls(X, Y, weights)
  File "/home/user1/src/pandas/pandas/stats/tests/test_ols.py", line 115, in _check_wls
    self.checkMovingOLS('rolling', x, y, weights=weights)
  File "/home/user1/src/pandas/pandas/stats/tests/test_ols.py", line 189, in checkMovingOLS
    result_index=n)
  File "/home/user1/src/pandas/pandas/stats/tests/test_ols.py", line 228, in compare
    assert_almost_equal(ref, res)
  File "/home/user1/src/pandas/pandas/util/testing.py", line 104, in assert_almost_equal
    assert_almost_equal(a[i], b[i])
  File "/home/user1/src/pandas/pandas/util/testing.py", line 120, in assert_almost_equal
    1, a / b, decimal=5, err_msg=err_msg(a, b), verbose=False)
  File "/usr/local/lib/python2.7/dist-packages/numpy/testing/utils.py", line 468, in assert_almost_equal
    raise AssertionError(msg)
AssertionError: 
Arrays are not almost equal to 5 decimals expected 1.79945 but got 1.50389
