Test suite throws lots of DateParseErrors
Hej hej, 

I built pandas from source on [python 2.7, numpy 1.8, dateutil 2.2] using

```
 python setup.py build_ext --inplace
```

When running the test suite,

```
 nosetests pandas 
```

I encounter lots of DateParseErrors. The error message is basically always the same, so here is an example one:

<pre>
======================================================================
ERROR: test_cdaterange_holidays (pandas.tseries.tests.test_daterange.TestCustomDateRange)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/cmsaf/cmsaf-ops3/sfinkens/usr/src/pandas-0.12.0/pandas/tseries/tests/test_daterange.py", line 597, in test_c
daterange_holidays
    xp = DatetimeIndex(['2013-05-02', '2013-05-03', '2013-05-06'])
  File "/cmsaf/cmsaf-ops3/sfinkens/usr/src/pandas-0.12.0/pandas/tseries/index.py", line 197, in __new__
    yearfirst=yearfirst)
  File "/cmsaf/cmsaf-ops3/sfinkens/usr/src/pandas-0.12.0/pandas/tseries/index.py", line 1812, in _str_to_dt_array
    data = _algos.arrmap_object(arr, parser)
  File "generated.pyx", line 2170, in pandas.algos.arrmap_object (pandas/algos.c:62269)
  File "/cmsaf/cmsaf-ops3/sfinkens/usr/src/pandas-0.12.0/pandas/tseries/index.py", line 1808, in parser
    yearfirst=yearfirst)
  File "/cmsaf/cmsaf-ops3/sfinkens/usr/src/pandas-0.12.0/pandas/tseries/tools.py", line 240, in parse_time_string
    raise DateParseError(e)
DateParseError: 'tuple' object has no attribute 'year'
</pre>


It occurs in the following functions:

<pre>
test_cdaterange
test_cdaterange_holidays
test_cdaterange_weekmask
test_cdaterange_weekmask_and_holidays
test_annual_ambiguous
test_business_daily
test_day_corner
test_monthly_ambiguous
test_non_datetimeindex
test_not_monotonic
test_raise_if_too_few
test_equal
test_equal_Raises_Type
test_equal_Raises_Value
test_greater
test_greaterEqual
test_greaterEqual_Raises_Value
test_greater_Raises_Type
test_greater_Raises_Value
test_notEqual
test_smaller
test_smallerEqual
test_smallerEqual_Raises_Type
test_smallerEqual_Raises_Value
test_smaller_Raises_Type
test_smaller_Raises_Value
test_sort
test_align_frame
test_align_series
test_as_frame_columns
test_asfreq
test_asfreq_ts
test_constructor
test_constructor_use_start_freq
test_convert_array_of_periods
test_dti_to_period
test_fields
test_frame_setitem
test_frame_to_time_stamp
test_get_loc_msg
test_getitem_datetime
test_intersection
test_iteration
test_joins
test_make_time_series
test_nested_dict_frame_constructor
test_period_index_unicode
test_pickle_freq
test_pindex_slice_index
test_shift
test_slice_keep_name
test_take
test_to_datetime_1703
test_to_timestamp
test_to_timestamp_preserve_name
test_tolist
test_ts_repr
test_union
test_anchor_week_end_time
test_constructor_corner
test_constructor_infer_freq
test_period_cons_weekly
test_period_constructor
test_repr
test_strftime
test_timestamp_tz_arg
test_business_daily
test_daily
test_hourly
test_minutely
test_secondly
test_weekly
test_ax_plot
test_axis_limits
test_both_style_and_color
test_business_freq
test_business_freq_convert
test_dataframe
test_fake_inferred_business
test_finder_annual
test_finder_daily
test_finder_hourly
test_finder_minutely
test_finder_monthly
test_finder_monthly_long
test_finder_quarterly
test_format_date_axis
test_frame_inferred
test_from_weekly_resampling
test_gap_upsample
test_gaps
test_get_datevalue
test_get_finder
test_high_freq
test_irreg_dtypes
test_irreg_hf
test_irregular_datetime64_repr_bug
test_line_plot_datetime_frame
test_line_plot_datetime_series
test_line_plot_inferred_freq
test_line_plot_period_frame
test_line_plot_period_series
test_mixed_freq_alignment
test_mixed_freq_hf_first
test_mixed_freq_irreg_period
test_mixed_freq_irregular_first
test_mixed_freq_lf_first
test_mixed_freq_regular_first
test_mpl_nopandas
test_nonnumeric_exclude
test_nonzero_base
test_plot_multiple_inferred_freq
test_plot_offset_freq
test_secondary_bar
test_secondary_bar_frame
test_secondary_frame
test_secondary_kde
test_secondary_legend
test_secondary_upsample
test_secondary_y
test_secondary_y_ts
test_time
test_time_musec
test_to_weekly_resampling
test_ts_plot_with_tz
test_tsplot
test_uhf
test_ohlc_5min
test_all_values_single_bin
test_annual_upsample
test_annual_upsample_B_e_b
test_annual_upsample_B_e_f
test_annual_upsample_B_s_b
test_annual_upsample_B_s_f
test_annual_upsample_D_e_b
test_annual_upsample_D_e_f
test_annual_upsample_D_s_b
test_annual_upsample_D_s_f
test_annual_upsample_M_e_b
test_annual_upsample_M_e_f
test_annual_upsample_M_s_b
test_annual_upsample_M_s_f
test_basic_downsample
test_basic_upsample
test_monthly_upsample
test_not_subperiod
test_quarterly_upsample
test_resample_5minute
test_resample_empty
test_resample_irregular_sparse
test_resample_to_timestamps
test_resample_tz_localized
test_upsample_daily_business_daily
test_upsample_with_limit
test_weekly_upsample
test_datetimeindex_constructor
test_dti_snap
test_fancy_getitem
test_fancy_setitem
test_argmin_argmax
test_constructor_coverage
test_get_duplicates
test_insert
test_map_bug_1677
test_misc_coverage
test_order
test_stringified_slice_with_tz
test_to_period_nofreq
test_union_bug_1745
test_union_coverage
test_partial_slice
test_partial_slice_daily
test_partial_slice_hourly
test_partial_slice_minutely
test_shift
test_at_time
test_ctor_str_intraday
test_first_subset
test_frame_to_period
test_last_subset
test_reasonable_keyerror
test_to_period
test_indexing
test_indexing_unordered
test_range_slice
test_date_range_localize
Test
test_field_access_localize
test_pass_dates_localize_to_utc
test_timestamp_tz_convert
test_agg_period_index
test_index_ctor_infer_periodindex
test_asof_periodindex
test_getitem_setitem_datetimeindex
test_getitem_setitem_periodindex
test_timeseries_periodindex
</pre>


Kind regards, 
Stephan
