32bit 0.14.0+git393-g959e3e4: test_select_dtypes_exclude_include 
goes like this

```
======================================================================
FAIL: test_select_dtypes_exclude_include (pandas.tests.test_frame.TestDataFrame)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/buildd/pandas-0.14.0+git393-g959e3e4/debian/tmp/usr/lib/python2.7/dist-packages/pandas/tests/test_frame.py", line 13039, in test_select_dtypes_exclude_include
    tm.assert_frame_equal(r, e)
  File "/tmp/buildd/pandas-0.14.0+git393-g959e3e4/debian/tmp/usr/lib/python2.7/dist-packages/pandas/util/testing.py", line 619, in assert_frame_equal
    assert_index_equal(left.columns, right.columns)
  File "/tmp/buildd/pandas-0.14.0+git393-g959e3e4/debian/tmp/usr/lib/python2.7/dist-packages/pandas/util/testing.py", line 557, in assert_index_equal
    right.dtype))
AssertionError: [index] left [object Index([u'e'], dtype='object')], right [Index([u'b', u'e'], dtype='object') object]
```

seems everywhere on 32bit

```
pandas_0.14.0+git393-g959e3e4-1~nd12.04+1_i386.build:FAIL: test_select_dtypes_exclude_include (pandas.tests.test_frame.TestDataFrame)
pandas_0.14.0+git393-g959e3e4-1~nd12.10+1_i386.build:FAIL: test_select_dtypes_exclude_include (pandas.tests.test_frame.TestDataFrame)
pandas_0.14.0+git393-g959e3e4-1~nd13.04+1_i386.build:FAIL: test_select_dtypes_exclude_include (pandas.tests.test_frame.TestDataFrame)
pandas_0.14.0+git393-g959e3e4-1~nd13.10+1_i386.build:FAIL: test_select_dtypes_exclude_include (pandas.tests.test_frame.TestDataFrame)
pandas_0.14.0+git393-g959e3e4-1~nd14.04+1_i386.build:FAIL: test_select_dtypes_exclude_include (pandas.tests.test_frame.TestDataFrame)
pandas_0.14.0+git393-g959e3e4-1~nd+1_i386.build:FAIL: test_select_dtypes_exclude_include (pandas.tests.test_frame.TestDataFrame)
pandas_0.14.0+git393-g959e3e4-1~nd70+1_i386.build:FAIL: test_select_dtypes_exclude_include (pandas.tests.test_frame.TestDataFrame)
pandas_0.14.0+git393-g959e3e4-1~nd80+1_i386.build:FAIL: test_select_dtypes_exclude_include (pandas.tests.test_frame.TestDataFrame)
```
