python crash without exception
I'm using pandas 0.9.0.  I have a function that returns a DataFrame.  The resulting DataFrame is 'unstable': many operations I try on it, interactively in IPython, lead to a complete python.exe crash.  I get no exception or indication on what's going wrong which is very frustrating.

Some operations do work however, like df.index or df.values.

In the screenshot below, r is a custom-built class with method to_dataframe() that generates the dataframe.  

In [6]: df=r.to_dataframe()

In [7]: df.index
Out[7]:
<class 'pandas.tseries.index.DatetimeIndex'>
[2010-01-01 00:00:00, ..., 2011-01-01 00:00:00]
Length: 108355, Freq: None, Timezone: None

In [9]: df.values
Out[9]:
array([[-0.],
       [-0.],
       [-0.],
       ...,
       [-0.],
       [-0.],
       [-0.]], dtype=float32)

In [10]: df
Out[10]:
HERE IS THE CRASH

I also get the crash when doing print df, df.resample('D'), etc. 
What can I do to get more information, or solve this bug?
