Error in test suite for indexing
This is on the VM running pandas windows builds.
Windows XP
Python 2.7 32-bit
numpy 1.7.1

```
======================================================================
ERROR: test_multiindex_assignment (pandas.tests.test_indexing.TestIndexing)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\workspace\pandas-windows-test-py27\pandas\tests\test_indexing.py", line 1003, in test_multiindex_assignment
    df.ix[name, 'new_col'] = new_vals
  File "C:\workspace\pandas-windows-test-py27\pandas\core\indexing.py", line 94, in __setitem__
    self._setitem_with_indexer(indexer, value)
  File "C:\workspace\pandas-windows-test-py27\pandas\core\indexing.py", line 363, in _setitem_with_indexer
    setter(labels[0], value)
  File "C:\workspace\pandas-windows-test-py27\pandas\core\indexing.py", line 318, in setter
    self.obj[item] = s
  File "C:\workspace\pandas-windows-test-py27\pandas\core\frame.py", line 1841, in __setitem__
    self._set_item(key, value)
  File "C:\workspace\pandas-windows-test-py27\pandas\core\frame.py", line 1907, in _set_item
    self._check_setitem_copy()
  File "C:\workspace\pandas-windows-test-py27\pandas\core\generic.py", line 1006, in _check_setitem_copy
    raise SettingWithCopyError(t)
SettingWithCopyError: A value is trying to be set on a copy of a slice from a DataFrame.
Try using .loc[row_index,col_indexer] = value instead
```

and also:

```
======================================================================
FAIL: test_inplace_mutation_resets_values (pandas.tests.test_index.TestMultiIndex)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\workspace\pandas-windows-test-py27\pandas\tests\test_index.py", line 1352, in test_inplace_mutation_resets_values
    assert_almost_equal(exp_values, new_values)
  File "testing.pyx", line 58, in pandas._testing.assert_almost_equal (pandas\src\testing.c:2440)
  File "testing.pyx", line 93, in pandas._testing.assert_almost_equal (pandas\src\testing.c:1692)
  File "testing.pyx", line 93, in pandas._testing.assert_almost_equal (pandas\src\testing.c:1692)
  File "testing.pyx", line 113, in pandas._testing.assert_almost_equal (pandas\src\testing.c:1973)
AssertionError: First object is numeric, second is not: 1 != 1L
```

and also:

```
======================================================================
FAIL: test_detect_chained_assignment (pandas.tests.test_indexing.TestIndexing)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\workspace\pandas-windows-test-py27\pandas\tests\test_indexing.py", line 1695, in test_detect_chained_assignment
    assert_frame_equal(df, expected)
  File "C:\workspace\pandas-windows-test-py27\pandas\util\testing.py", line 469, in assert_frame_equal
    check_less_precise=check_less_precise)
  File "C:\workspace\pandas-windows-test-py27\pandas\util\testing.py", line 417, in assert_series_equal
    assert_attr_equal('dtype', left, right)
  File "C:\workspace\pandas-windows-test-py27\pandas\util\testing.py", line 401, in assert_attr_equal
    assert_equal(left_attr,right_attr,"attr is not equal [{0}]" .format(attr))
  File "C:\workspace\pandas-windows-test-py27\pandas\util\testing.py", line 384, in assert_equal
    assert a == b, "%s: %r != %r" % (msg.format(a,b), a, b)
AssertionError: attr is not equal [dtype]: dtype('int32') != dtype('int64')
```
