plot() error when using set_index with drop=False
Below is data parsed from a csv file. Next I'm trying the set_index with drop=False.  Everything seems to work correctly until I attempt plot().  plot() works ok if I use drop=True.

Now that I'm looking at it more,
df2['date'].plot() works ok with drop=False, and the Y axis ticks are dates.  Perhaps this is just my lack of knowledge of when a secondary Y axis is required.

This is all in the ipython notebook, using **version** 0.9.1 pandas

In [228]:

df2 = pd.read_csv('foo2.csv',parse_dates=['date'] ) #parse the first column as datetime
df2
Out[228]:
                  date     AA    AAPL     GE
0  2011-10-03 00:00:00   8.90  374.60  14.69
1  2011-10-04 00:00:00   9.12  372.50  14.86
2  2011-10-05 00:00:00   9.37  378.25  15.27
3  2011-10-06 00:00:00   9.88  377.37  15.53
4  2011-10-07 00:00:00   9.71  369.80  15.50
5  2011-10-10 00:00:00  10.09  388.81  16.14
6  2011-10-11 00:00:00  10.30  400.29  16.14
7  2011-10-12 00:00:00  10.05  402.19  16.40
8  2011-10-13 00:00:00  10.10  408.43  16.22
9  2011-10-14 00:00:00  10.26  422.00  16.60

29]:

df2 = df2.set_index('date', drop=False)
df2
Out[229]:
                           date     AA    AAPL     GE
date  
2011-10-03  2011-10-03 00:00:00   8.90  374.60  14.69
2011-10-04  2011-10-04 00:00:00   9.12  372.50  14.86
2011-10-05  2011-10-05 00:00:00   9.37  378.25  15.27
2011-10-06  2011-10-06 00:00:00   9.88  377.37  15.53
2011-10-07  2011-10-07 00:00:00   9.71  369.80  15.50
2011-10-10  2011-10-10 00:00:00  10.09  388.81  16.14
2011-10-11  2011-10-11 00:00:00  10.30  400.29  16.14
2011-10-12  2011-10-12 00:00:00  10.05  402.19  16.40
2011-10-13  2011-10-13 00:00:00  10.10  408.43  16.22
2011-10-14  2011-10-14 00:00:00  10.26  422.00  16.60

Out[230]:
## <matplotlib.axes.AxesSubplot at 0x8c9cf30>

RuntimeError                              Traceback (most recent call last)
G:\Python2732\lib\site-packages\IPython\zmq\pylab\backend_inline.pyc in show(close)
    100     try:
    101         for figure_manager in Gcf.get_all_fig_managers():
--> 102             send_figure(figure_manager.canvas.figure)
    103     finally:
    104         show._to_draw = []
